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        <EOYAmt>15940</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>112391</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>27128</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>79030</BOYAmt>
        <EOYAmt>85263</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <TotalAssetsGrp>
        <BOYAmt>350392</BOYAmt>
        <EOYAmt>778532</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>9482</BOYAmt>
        <EOYAmt>9759</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>30866</BOYAmt>
        <EOYAmt>50833</EOYAmt>
      </DeferredRevenueGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>40348</BOYAmt>
        <EOYAmt>60592</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrgDoesNotFollowSFAS117Ind>X</OrgDoesNotFollowSFAS117Ind>
      <CapStkTrPrinCurrentFundsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </CapStkTrPrinCurrentFundsGrp>
      <PdInCapSrplsLandBldgEqpFundGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </PdInCapSrplsLandBldgEqpFundGrp>
      <RtnEarnEndowmentIncmOthFndsGrp>
        <BOYAmt>310044</BOYAmt>
        <EOYAmt>717940</EOYAmt>
      </RtnEarnEndowmentIncmOthFndsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>310044</BOYAmt>
        <EOYAmt>717940</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>350392</BOYAmt>
        <EOYAmt>778532</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>407896</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>0</FSAuditedInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>112391</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>27128</DepreciationAmt>
        <BookValueAmt>85263</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>85263</TotalBookValueLandBuildingsAmt>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>CTSNET IS MANAGED BY THE SOCIETY OF THORACIC SURGEONS (STS). CTSNET MAINTAINS ITS OFFICES AT STS'S HEADQUARTERS AT 633 N. SAINT CLAIR STREET, FLOOR 23, CHICAGO, IL 60611. CTSNET AND STS HAVE A CONTRACT THAT DEFINES THE RESPONSIBILITIES OF THE MANAGEMENT FIRM. A MANAGEMENT FEE IS NEGOTIATED THAT COVERS THE COST OF THE CTSNET EXECUTIVE DIRECTOR, SUPPORT STAFF, OFFICE EQUIPMENT AND OFFICE SPACE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>CTSNET IS COMPRISED OF IT'S THREE FOUNDING MEMBERS: SOCIETY OF THORACIC SURGEONS (STS), AMERICAN ASSOCIATION FOR THORACIC SURGERY (AATS), AND EUROPEAN ASSOCIATION FOR CARDIO-THORACIC SURGERY (EACTS). IN ADDITION, CTSNET HAS PARTICIPATION AGREEMENTS IN PLACE WITH 48 CARDIOTHORACIC SURGICAL SOCIETIES AROUND THE WORLD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS IS COMPRISED OF TEN DIRECTORS WHICH ARE APPOINTED BY THE MEMBERS, FOUR BY STS AND THREE EACH BY AATS AND EACTS. EACH DIRECTOR SHALL BE APPOINTED FOR A TWO YEAR TERM AND UNTIL HIS OR HER SUCCESSOR HAS BEEN APPOINTED AND QUALIFIED. THE OFFICERS (PRESIDENT, SECRETARY AND TREASURER) ARE ELECTED BY AND FROM THE BOARD OF DIRECTORS. ONE REPRESENTATIVE FROM EACH MEMBER WILL SERVE THE OFFICES OF PRESIDENT, SECRETARY AND TREASURER AT ALL TIMES, EXCEPT DURING PERIODS OF ANY UNFILLED VACANCIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING BODY IS ENTIRELY MADE UP OF REPRESENTATIVES FROM EACH OF THE THREE MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11</FormAndLineReferenceDesc>
        <ExplanationTxt>AN ELECTRONIC COPY OF FORM 990 IS PROVIDED TO THE BOARD OF DIRECTORS VIA EMAIL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FINANCIAL STATEMENTS ARE PUT ON ORGANIZATION'S WEBSITE. THE ORGANIZATION'S GOVERNING DOCUMENTS ARE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>