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        <TitleTxt>COUNCILOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ANDREW RICE</PersonNm>
        <TitleTxt>COUNCILOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>EMIKO SENBA</PersonNm>
        <TitleTxt>COUNCILOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHELE STERLING</PersonNm>
        <TitleTxt>COUNCILOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KAREN DAVIS</PersonNm>
        <TitleTxt>COUNCILOR (UNTIL 9/18)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>HERTA FLOR</PersonNm>
        <TitleTxt>COUNCILOR (UNTIL 9/18)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL GOLD</PersonNm>
        <TitleTxt>COUNCILOR (UNTIL 9/18)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>EVA KOSEK</PersonNm>
        <TitleTxt>COUNCILOR (UNTIL 9/18)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MATTHEW R D'UVA</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>330529</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>72640</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>COLLEEN D EUBANKS</PersonNm>
        <TitleTxt>CHIEF OPERATING OFFICER BEG. 4/18</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>113447</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>17963</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>NEIL ANDREWS--MANAGING EDITOR</PersonNm>
        <TitleTxt>PAIN RESEARCH FORUM (PRF) AND RELIEF</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>101600</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>16664</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JILL M TREBY</PersonNm>
        <TitleTxt>DIRECTOR OF MEMBERSHIP AND MARKETING</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>123990</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>18051</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>669566</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>125318</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>4</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>FREEMAN AUDIO VISUAL</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 650519</AddressLine1Txt>
            <CityNm>DALLAS</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>752650519</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>AUDIO VISUAL SERVICES</ServicesDesc>
        <CompensationAmt>447111</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>MASSACHUSETTS CONVENTION CENTER AUTHORIT</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>415 SUMMER ST</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02210</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>RENTAL SERVICES</ServicesDesc>
        <CompensationAmt>379234</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>FREEMAN BOSTON</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>275 BODWELL STREET</AddressLine1Txt>
            <CityNm>AVON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02322</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONVENTION RELATED SERVICES</ServicesDesc>
        <CompensationAmt>363429</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>LEVY RESTAURANTS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>980 N MICHIGAN AVE</AddressLine1Txt>
            <CityNm>CHICAGO</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60611</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>FOOD &amp; BEREVAGES</ServicesDesc>
        <CompensationAmt>341911</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>WOLTERS KLUWER HEALTH</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>16705 COLLECTION CENTER DRIVE</AddressLine1Txt>
            <CityNm>CHICAGO</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60693</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>SUBSCRIPTION SERVICES</ServicesDesc>
        <CompensationAmt>145801</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>8</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>1544629</AllOtherContributionsAmt>
      <NoncashContributionsAmt>24000</NoncashContributionsAmt>
      <TotalContributionsAmt>1544629</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>CONFERENCE REVENUE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>3459363</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3459363</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>792752</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>792752</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>EDITORIAL STIPEND</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>342818</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>342818</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>4594933</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>204647</TotalRevenueColumnAmt>
        <ExclusionAmt>204647</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>1376349</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1376349</RelatedOrExemptFuncIncomeAmt>
      </RoyaltiesRevenueGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>213199</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>212074</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>1125</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>1125</TotalRevenueColumnAmt>
        <ExclusionAmt>1125</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <GrossSalesOfInventoryAmt>69821</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>69821</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>69821</RelatedOrExemptFuncIncomeAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueMiscGrp>
        <Desc>MEETING COMMISSION</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>71452</TotalRevenueColumnAmt>
        <ExclusionAmt>71452</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>MISCELLANEOUS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1015</TotalRevenueColumnAmt>
        <ExclusionAmt>1015</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>72467</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>7863971</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>6041103</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>278239</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>135000</TotalAmt>
        <ProgramServicesAmt>135000</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>35250</TotalAmt>
        <ProgramServicesAmt>35250</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <ForeignGrantsGrp>
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        <ProgramServicesAmt>444026</ProgramServicesAmt>
      </ForeignGrantsGrp>
      <CompCurrentOfcrDirectorsGrp>
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        <ProgramServicesAmt>501221</ProgramServicesAmt>
        <ManagementAndGeneralAmt>33358</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>815370</ProgramServicesAmt>
        <ManagementAndGeneralAmt>30809</ManagementAndGeneralAmt>
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      <PensionPlanContributionsGrp>
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        <ProgramServicesAmt>44300</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2948</ManagementAndGeneralAmt>
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      <OtherEmployeeBenefitsGrp>
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        <ProgramServicesAmt>81722</ProgramServicesAmt>
        <ManagementAndGeneralAmt>16776</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>83310</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17663</ManagementAndGeneralAmt>
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      <FeesForServicesLegalGrp>
        <TotalAmt>27724</TotalAmt>
        <ProgramServicesAmt>26238</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1486</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
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        <ProgramServicesAmt>39766</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2538</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
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        <ManagementAndGeneralAmt>26112</ManagementAndGeneralAmt>
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      <FeesForServicesOtherGrp>
        <TotalAmt>1242207</TotalAmt>
        <ProgramServicesAmt>1015452</ProgramServicesAmt>
        <ManagementAndGeneralAmt>226755</ManagementAndGeneralAmt>
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      <AdvertisingGrp>
        <TotalAmt>158363</TotalAmt>
        <ProgramServicesAmt>158363</ProgramServicesAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>233935</TotalAmt>
        <ProgramServicesAmt>228493</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5442</ManagementAndGeneralAmt>
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      <InformationTechnologyGrp>
        <TotalAmt>200181</TotalAmt>
        <ProgramServicesAmt>128872</ProgramServicesAmt>
        <ManagementAndGeneralAmt>71309</ManagementAndGeneralAmt>
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      <OccupancyGrp>
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        <ProgramServicesAmt>88391</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5642</ManagementAndGeneralAmt>
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      <TravelGrp>
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        <ProgramServicesAmt>452997</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1470</ManagementAndGeneralAmt>
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      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>755206</ProgramServicesAmt>
        <ManagementAndGeneralAmt>516130</ManagementAndGeneralAmt>
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      <InterestGrp>
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        <ManagementAndGeneralAmt>334</ManagementAndGeneralAmt>
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      <DepreciationDepletionGrp>
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        <ProgramServicesAmt>156860</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9175</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>39408</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1162</ManagementAndGeneralAmt>
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        <Desc>EXHIBITION</Desc>
        <TotalAmt>378441</TotalAmt>
        <ProgramServicesAmt>378441</ProgramServicesAmt>
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      <OtherExpensesGrp>
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        <TotalAmt>250719</TotalAmt>
        <ProgramServicesAmt>250719</ProgramServicesAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>131300</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>MERCHANT FEES</Desc>
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        <ProgramServicesAmt>127618</ProgramServicesAmt>
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      <AllOtherExpensesGrp>
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        <ProgramServicesAmt>215565</ProgramServicesAmt>
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        <ProgramServicesAmt>6333888</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1078145</ManagementAndGeneralAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>2925701</EOYAmt>
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        <EOYAmt>256933</EOYAmt>
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      <PledgesAndGrantsReceivableGrp>
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      <AccountsReceivableGrp>
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        <EOYAmt>284638</EOYAmt>
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        <EOYAmt>15022</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
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        <EOYAmt>381535</EOYAmt>
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        <EOYAmt>3311738</EOYAmt>
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        <EOYAmt>6281459</EOYAmt>
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        <EOYAmt>223125</EOYAmt>
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      <TotalAssetsGrp>
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        <EOYAmt>13680151</EOYAmt>
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        <EOYAmt>532410</EOYAmt>
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        <EOYAmt>50000</EOYAmt>
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        <EOYAmt>2233111</EOYAmt>
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      <EscrowAccountLiabilityGrp>
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        <EOYAmt>1616614</EOYAmt>
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        <EOYAmt>4432135</EOYAmt>
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        <EOYAmt>8115666</EOYAmt>
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      <TemporarilyRstrNetAssetsGrp>
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        <EOYAmt>1132350</EOYAmt>
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        <EOYAmt>9248016</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>13680151</EOYAmt>
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      <NetUnrlzdGainsLossesInvstAmt>-581003</NetUnrlzdGainsLossesInvstAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
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      <GiftsGrantsContrisRcvd509Grp>
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        <CurrentTaxYearMinus3YearsAmt>11400</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>830836</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>441141</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1544629</CurrentTaxYearAmt>
        <TotalAmt>2936096</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>8723690</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2152665</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>6179879</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2471756</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>6041103</CurrentTaxYearAmt>
        <TotalAmt>25569093</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>8831780</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2164065</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>7010715</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2912897</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>7585732</CurrentTaxYearAmt>
        <TotalAmt>28505189</TotalAmt>
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      <AmountsRcvdDsqlfyPersonGrp>
        <CurrentTaxYearAmt>759045</CurrentTaxYearAmt>
        <TotalAmt>759045</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <CurrentTaxYearMinus4YearsAmt>2897714</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1253115</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1531950</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1273304</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1631141</CurrentTaxYearAmt>
        <TotalAmt>8587224</TotalAmt>
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      <SubstAndDsqlfyPrsnsTotGrp>
        <CurrentTaxYearMinus4YearsAmt>2897714</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1253115</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1531950</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1273304</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>2390186</CurrentTaxYearAmt>
        <TotalAmt>9346269</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>19158920</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>323379</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>160076</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>161373</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>190288</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>204647</CurrentTaxYearAmt>
        <TotalAmt>1039763</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>323379</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>160076</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>161373</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>190288</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>204647</CurrentTaxYearAmt>
        <TotalAmt>1039763</TotalAmt>
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      <OtherIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>7186</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>12594</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3257</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>28833</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>72467</CurrentTaxYearAmt>
        <TotalAmt>124337</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>9162345</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2336735</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>7175345</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3132018</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>7862846</CurrentTaxYearAmt>
        <TotalAmt>29669289</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.64570</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.60280</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.03500</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.04370</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001" />
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <AgentTrusteeEtcInd>0</AgentTrusteeEtcInd>
      <InclEscrowCustodialAcctLiabInd>1</InclEscrowCustodialAcctLiabInd>
      <ExplanationProvidedInd>X</ExplanationProvidedInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>792816</OtherCostOrOtherBasisAmt>
        <BookValueAmt>792816</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>3061912</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>616820</DepreciationAmt>
        <BookValueAmt>2445092</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>136338</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>92855</DepreciationAmt>
        <BookValueAmt>43483</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>537724</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>507377</DepreciationAmt>
        <BookValueAmt>30347</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>3311738</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>7427256</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>-581003</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>170400</DonatedServicesAndUseFcltsAmt>
      <RevenueNotReportedAmt>-410603</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>7837859</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>26112</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>26112</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>7863971</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>7556321</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>170400</DonatedServicesUseFcltsAmt>
      <ExpensesNotReportedAmt>170400</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>7385921</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>26112</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>26112</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>7412033</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART IV, LINE 2B:</FormAndLineReferenceDesc>
        <ExplanationTxt>IASP, THROUGH ITS BYLAWS, PROVIDES FOR THE CREATION OF SPECIAL INTEREST GROUPS (SIGS). THERE ARE CURRENTLY 24 SIGS. IASP COLLECTS DUES ON BEHALF OF THE SIGS TO FUND MEETINGS AND ORGANIZE CONFERENCES. IASP MAINTAINS SIG FUNDS IN THE SOCIETY'S BANK ACCOUNT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR THE YEAR ENDED DECEMBER 31, 2018, IASP HAS DOCUMENTED ITS CONSIDERATION OF FASB ASC 740-10, INCOME TAXES, THAT PROVIDES GUIDANCE FOR REPORTING UNCERTAINTY IN INCOME TAXES AND HAS DETERMINED THAT NO MATERIAL UNCERTAIN TAX POSITIONS QUALIFY FOR EITHER RECOGNITION OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>73600</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>116837</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>MIDDLE EAST AND NORTH AFRICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>6800</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>21700</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>RUSSIA AND NEIGHBORING STATES</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>9200</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>SOUTH AMERICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>83724</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>SOUTH ASIA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>114365</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>SUB-SAHARAN AFRICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>17800</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>444026</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>444026</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>15000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>6800</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <PurposeOfGrantTxt>SUPPORTS CLINICAL FELLOWSHIP TRAINING FOR TWO FELLOWS FROM SOUTH ASIA.</PurposeOfGrantTxt>
        <CashGrantAmt>12500</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>7040</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>20000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT FOR THE EUROPEAN PAIN SCHOOL AT THE UNIVERSITY OF SIENA.</PurposeOfGrantTxt>
        <CashGrantAmt>12797</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>SOUTH AMERICA</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>7024</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>SOUTH ASIA</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>10000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>SOUTH ASIA</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>5865</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>SOUTH ASIA</RegionTxt>
        <PurposeOfGrantTxt>SUPPORT RESEARCHERS WHO ARE IN THE EARLY CAREER STAGE OF PAIN INVESTIGATIONS.</PurposeOfGrantTxt>
        <CashGrantAmt>10000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>0</Total501c3OrgCnt>
      <TotalOtherOrgCnt>10</TotalOtherOrgCnt>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <RecipientCnt>26</RecipientCnt>
        <CashGrantAmt>38300</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>SUPPORT TO ATTEND NORTH AMERICAN PAIN SCHOOL</TypeOfAssistanceTxt>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>1000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <RecipientCnt>75</RecipientCnt>
        <CashGrantAmt>76500</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER AND CASH</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>SUPPORT TO ATTEND NORTH AMERICAN PAIN SCHOOL</TypeOfAssistanceTxt>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>500</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>MIDDLE EAST AND NORTH AFRICA</RegionTxt>
        <RecipientCnt>5</RecipientCnt>
        <CashGrantAmt>6800</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER AND CASH</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <RecipientCnt>22</RecipientCnt>
        <CashGrantAmt>19200</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>SUPPORT TO ATTEND NORTH AMERICAN PAIN SCHOOL</TypeOfAssistanceTxt>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <RecipientCnt>5</RecipientCnt>
        <CashGrantAmt>2500</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>RUSSIA AND NEIGHBORING STATES</RegionTxt>
        <RecipientCnt>8</RecipientCnt>
        <CashGrantAmt>9200</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER AND CASH</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>SOUTH AMERICA</RegionTxt>
        <RecipientCnt>59</RecipientCnt>
        <CashGrantAmt>76700</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>SOUTH ASIA</RegionTxt>
        <RecipientCnt>56</RecipientCnt>
        <CashGrantAmt>88500</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER AND CASH</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</TypeOfAssistanceTxt>
        <RegionTxt>SUB-SAHARAN AFRICA</RegionTxt>
        <RecipientCnt>12</RecipientCnt>
        <CashGrantAmt>17800</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <TransferToForeignCorpInd>1</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANT RECIPIENTS MUST SUBMIT ANNUAL REPORTS SHOWING THE PROGRESS OF THEIR RESEARCH, PRELIMINARY FINDINGS, AND PROVIDE AN ACCOUNTING OF THEIR EXPENSES TO DATE. UPON COMPLETION, THE RECIPIENTS SUBMIT AN ADDITIONAL REPORT SHOWING THEIR RESEARCH FINDINGS AND PUBLICATIONS AS WELL AS GRANT EXPENSE DETAILS. THE RELEVANT COMMITTEE REVIEWS THESE REPORTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>DUKE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>A/R LOCKBOX PO BOX 602651</AddressLine1Txt>
          <CityNm>CHARLOTTE</CityNm>
          <StateAbbreviationCd>NC</StateAbbreviationCd>
          <ZIPCd>28260</ZIPCd>
        </USAddress>
        <RecipientEIN>560532129</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>100000</CashGrantAmt>
        <PurposeOfGrantTxt>JJ BONICA GRANT REGARDING CHRISTOPHER DONNELLY</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>YALE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2 WHITNEY AVENUE 6TH FLOOR</AddressLine1Txt>
          <CityNm>NEW HAVEN</CityNm>
          <StateAbbreviationCd>CT</StateAbbreviationCd>
          <ZIPCd>06510</ZIPCd>
        </USAddress>
        <RecipientEIN>060646973</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>20000</CashGrantAmt>
        <PurposeOfGrantTxt>IASP EARLY CAREER GRANT TO DR. CANDICE PAULSEN</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>DUQUESNE UNIVERSITY OF THE HOLY SPIRIT</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>600 FORBES AVENUE</AddressLine1Txt>
          <CityNm>PITTSBURGH</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>15282</ZIPCd>
        </USAddress>
        <RecipientEIN>251035663</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>15000</CashGrantAmt>
        <PurposeOfGrantTxt>IASP COLLABORATIVE RESEARCH GRANT REGARDING DR. BENEDICT KOLBER</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>3</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>FINANCIAL AID TO ATTEND WORLD CONGRESS</GrantTypeTxt>
        <RecipientCnt>39</RecipientCnt>
        <CashGrantAmt>26250</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>SUPPORT TO ATTEND NORTH AMERICAN PAIN SCHOOL</GrantTypeTxt>
        <RecipientCnt>18</RecipientCnt>
        <CashGrantAmt>9000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANT RECIPIENTS MUST SUBMIT ANNUAL REPORTS SHOWING THE PROGRESS OF THEIR RESEARCH, PRELIMINARY FINDINGS, AND PROVIDE AN ACCOUNTING OF THEIR EXPENSE TO DATE. UPON COMPLETION, THE RECIPIENTS SUBMIT AN ADDITIONAL REPORT SHOWING THEIR RESEARCH FINDINGS AND PUBLICATIONS AS WELL AS GRANT EXPENSE DETAILS. THE FELLOWSHIPS, GRANTS AND AWARDS WORKING GROUP REVIEWS THESE REPORTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <IndependentConsultantInd>X</IndependentConsultantInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>1</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>1</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>1</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MATTHEW R D'UVA</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>279289</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>51240</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>41893</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>30747</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>403169</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 5</FormAndLineReferenceDesc>
        <ExplanationTxt>MATTHEW D'UVA'S COMPENSATION IS BASED ON A STRUCTURE THAT INCLUDES SPECIFIC REVENUE MARKERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>MATTHEW D'UVA'S COMPENSATION IS BASED ON A STRUCTURE THAT INCLUDES SPECIFIC REVENUE MARKERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>MATHEW D'UVA RECEIVED A BONUS OF $51,240.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>REGULAR AND TRAINEE MEMBERS HAVE VOTING RIGHTS; HONORARY AND AFFILIATE MEMBERS DO NOT HAVE VOTING RIGHTS. HONORARY MEMBERS WHO WERE REGULAR MEMBERS AT THE TIME OF THEIR SELECTION TO HONORARY STATUS RETAIN THEIR VOTING RIGHTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>REGULAR, TRAINEE, AND SOME HONORARY MEMBERS HAVE ONE VOTE PER MEMBER AND ARE ALLOWED TO VOTE IN THE ELECTION OF OFFICERS AND COUNCILORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>REGULAR AND TRAINEE MEMBERS RATIFY ANY BYLAW MODIFICATIONS PASSED BY THE COUNCIL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>MANAGEMENT REVIEWS THE FORM 990 AS PREPARED BY AN INDEPENDENT ACCOUNTING FIRM. AFTER MANAGEMENT REVIEW, THE EXECUTIVE COMMITTEE REVIEWS THE RETURN BEFORE FILING WITH THE INTERNAL REVENUE SERVICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>PRIOR TO A COUNCIL OR SCIENTIFIC PROGRAM COMMITTEE MEETING, ALL MEMBERS AND THE STAFF DECLARE ANY POTENTIAL CONFLICTS OF INTEREST. ALL CONGRESS SPEAKERS AND JOURNAL AUTHORS SUBMIT CONFLICT OF INTEREST FORMS PRIOR TO PUBLICATION/SPEAKING. IF A CONFLICT OF INTEREST IS FOUND, SAID MEMBER RECUSES HIMSELF/HERSELF FROM DISCUSSION AND VOTING ON THE MATTER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE IASP EXECUTIVE COMMITTEE USES VARIOUS ASSOCIATION SALARY SURVEYS WHEN REVIEWING AND SETTING THE ANNUAL COMPENSATION OF THE CHIEF EXECUTIVE OFFICER. THE COMMITTEE PERFORMS A FORMAL EVALUATION OF THE CHIEF EXECUTIVE OFFICER'S WORK, WHICH INCLUDES RATING PERFORMANCE AGAINST THE ORGANIZATION'S GOALS, ANALYSIS OF COMPENSATION, AND A MERIT-BASED SALARY ADJUSTMENT. IN 2015, A FORMAL SALARY EVALUATION WAS PERFORMED BY AN INDEPENDENT CONSULTANT DURING THE EXECUTIVE SEARCH PROCESS. PERFORMANCE REVIEWS ARE DOCUMENTED IN WRITING TO THE EXECUTIVE DIRECTOR. THE LAST PERFORMANCE REVIEW TOOK PLACE IN FEBRUARY 2019. ALL OTHER EMPLOYEE COMPENSATION IS DETERMINED BY THE CHIEF EXECUTIVE OFFICER, USING SALARY RANGES PROVIDED BY AN OUTSIDE COMPENSATION CONSULTANT OR COMPENSATION SURVEYS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>IASP BYLAWS ARE POSTED ON THE WEBSITE. THE MOST RECENT AUDITED FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST AND THE CONFLICT OF INTEREST POLICY IS DISCLOSED ON THE 990.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTANTS &amp; OTHER PROF FEES: PROGRAM SERVICE EXPENSES 485,682. MANAGEMENT AND GENERAL EXPENSES 139,634. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 625,316. CONTRACT LABOR: PROGRAM SERVICE EXPENSES 492,481. MANAGEMENT AND GENERAL EXPENSES 87,121. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 579,602. GRAPHIC DESIGNER: PROGRAM SERVICE EXPENSES 37,289. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 37,289.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 8</FormAndLineReferenceDesc>
        <ExplanationTxt>A PRIOR PERIOD ADJUSTMENT WAS MADE TO RECORD MEMBERSHIP DUES WHEN EARNED, RATHER THAN WHEN RECEIVED.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>