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      <ContractorCompensationGrp>
        <ContractorName>
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            <BusinessNameLine1Txt>GOODWIN PROCTER</BusinessNameLine1Txt>
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        <ContractorAddress>
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        <ExplanationTxt>LABCENTRAL IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE HAVING RECEIVED FAVORABLE DETERMINATION OF ITS STATUS FROM THE IRS IN A LETTER DATED JUNE 26, 2014. MAINSTPBC IS REQUIRED TO FILE CORPORATE INCOME TAX RETURNS UNDER FEDERAL AND MASSACHUSETTS TAX LAW EVEN IF THERE IS NO ACTIVITY. MASSACHUSETTS ALSO REQUIRES ALL CORPORATIONS TO PAY A MINIMUM TAX IF ACTUAL TAX IS LOWER THAN THE MINIMUM. LABCENTRAL ENTERED INTO A LABORATORY MANAGEMENT AGREEMENT WITH PFIZER (SEE NOTE 2) THAT HAS BEEN DETERMINED TO BE AN UNRELATED BUSINESS ACTIVITY AND REQUIRES LABCENTRAL TO FILE FORM 990-T EXEMPT ORGANIZATION BUSINESS INCOME TAX RETURN. LABCENTRAL HAS GENERATED NET TAXABLE INCOME FROM THIS ACTIVITY AND HAS PROVIDED FOR FEDERAL AND STATE INCOME TAXES IN THE AMOUNT OF $357,080 AND $200,000 DURING 2019 AND 2018, RESPECTIVELY. THE COMPANY FOLLOWS ACCOUNTING GUIDANCE REGARDING RECOGNITION, MEASUREMENT, PRESENTATION, AND DISCLOSURE OF UNCERTAIN TAX POSITIONS IN THE FINANCIAL STATEMENTS. TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN THE COURSE OF PREPARING THE COMPANY'S TAX RETURNS, INCLUDING THE POSITION THAT THE COMPANY QUALIFIES AS A TAX EXEMPT ENTITY, ARE REQUIRED TO BE EVALUATED TO DETERMINE WHETHER THE TAX POSITIONS ARE "MORE-LIKELY-THAN-NOT" TO BE UPHELD UNDER REGULATORY REVIEW. MANAGEMENT HAS ANALYZED THE TAX POSITIONS TAKEN BY THE COMPANY, AND HAS CONCLUDED THAT AS OF DECEMBER 31, 2019, THERE ARE NO UNCERTAIN TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY (OR ASSET) OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KRISTA LICATA</PersonNm>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>10287</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>29534</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SHAWN AYUBE</PersonNm>
        <TitleTxt>DIR. OF HARVARD LIFE LAB O</TitleTxt>
        <BaseCompensationFilingOrgAmt>201867</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12041</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>29534</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>243442</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PATRICK TUCKER</PersonNm>
        <TitleTxt>IT MANAGER</TitleTxt>
        <BaseCompensationFilingOrgAmt>114209</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>6807</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>29534</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>150550</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>ASPEN CONSULTING LLC</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>LISA VELARDO, MANAGING DIRECTOR</RelationshipDescriptionTxt>
        <TransactionAmt>69995</TransactionAmt>
        <TransactionDesc>LISA VELARDO, THE CFO/TREASURER OF LAB CENTRAL, INC. IS ALSO THE MANAGING DIRECTOR OF ASPEN CONSULTING, LLC WHICH PROVIDES FINANCIAL AND ACCOUNTING SERVICES TO LAB CENTRAL, INC.</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>BIOINNOVATION CAPITAL</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>JOHANNES FRUEHAUF (CEO), PETER PARKER (DIRECTOR) &amp; STEVEN TREGAY (CHAIRMAN)</RelationshipDescriptionTxt>
        <TransactionAmt>51360</TransactionAmt>
        <TransactionDesc>BIOINNOVATION CAPITAL RENTS OFFICE SPACE FROM LAB CENTRAL. JOHANNES FRUEHAUF (CEO), PETER PARKER (DIRECTOR) AND STEVEN TREGAY (CHAIRMAN/DIRECTOR) ARE PARTNERS OF THAT FIRM.</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>LAB EQUIPMENT</Desc>
        <ContributionCnt>11</ContributionCnt>
        <NoncashContributionsRptF990Amt>788256</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THREE BOARD MEMBERS ARE PARTNERS OF BIOINNOVATION CAPITAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>A FULL COPY OF FORM 990 IS MADE AVAILABLE TO THE BOARD OF DIRECTORS PRIOR FILING WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>LAB CENTRAL, INC. HAS A WRITTEN CONFLICT OF INTEREST POLICY THAT REQUIRES THE BOARD TO REVIEW ALL RELATED PARTY TRANSACTIONS TO ENSURE NO CONFLICTS EXIST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS DETERMINES THE COMPENSATION FOR THE ORGANIZATION'S PRESIDENT, EXECUTIVE DIRECTORS AND OFFICERS. THE PROCESS INCLUDES USING VARIOUS SOURCES TO EVALUATE THE COMPENSATION FOR EACH INDIVIDUAL. THE ORGANIZATION ALSO COMPLETED AN INDEPENDENT COMPENSATION STUDY. THE BOARD MUST APPROVE THE WRITTEN AGREEMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>LAB CENTRAL, INC.'S GOVERNING DOCUMENTS, FINANCIAL STATEMENTS AND FORM 990 ARE AVAILABLE UPON REQUEST TO THE GENERAL PUBLIC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CUMULATIVE EFFECT ADJUSTMENT UPON ADOPTION OF TOPIC 606 16,337.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE WAS NO CHANGE IN THE OVERSIGHT PROCESS OR SELECTION PROCESS DURING THE TAX YEAR 2019.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043500001">
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>MAINSTPBC INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>700 MAIN ST</AddressLine1Txt>
          <CityNm>CAMBRIDGE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02139</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>LAB SERVICES</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LAB CENTRAL</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>-6163</ShareOfTotalIncomeAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>1</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>MAINSTPBC INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>R</TransactionTypeTxt>
        <InvolvedAmt>41362</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>