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      <TotalAdjustments>-57752</TotalAdjustments>
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      <NetUnrealizedGainsInvestments>-57752</NetUnrealizedGainsInvestments>
      <RevenueNotRptdF990>-57752</RevenueNotRptdF990>
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      <RevenueNotRptdOnFinStmt>9110</RevenueNotRptdOnFinStmt>
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      <ExpensesNotRptdF990>0</ExpensesNotRptdF990>
      <ExpensesSubtotal>784106</ExpensesSubtotal>
      <InvestmentExpensesNotIncluded2>9110</InvestmentExpensesNotIncluded2>
      <ExpensesNotRptdOnFinStmt>9110</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>793216</TotalExpensesPerForm990>
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        <Identifier>DESCRIPTION OF UNCERTAIN TAX POSITIONS UNDER FIN 48:</Identifier>
        <ReturnReference>PART X:</ReturnReference>
        <Explanation>THE FOUNDATION'S APPLICATION OF GAAPUSA REGARDING UNCERTAIN TAX POSITIONS HAD NO EFFECT ON ITS FINANCIAL POSITION AS MANAGEMENT BELIEVES THE FOUNDATION HAS NO MATERIAL UNRECOGNIZED INCOME TAX BENEFITS, INCLUDING ANY POTENTIAL RISK OF LOSS OF ITS NOT-FOR-PROFIT TAX STATUS. THE FOUNDATION WOULD ACCOUNT FOR ANY POTENTIAL INTEREST OF PENALTIES RELATED TO POSSIBLE FUTURE LIABILITIES FOR UNRECOGNIZED INCOME TAX BENEFITS AS INCOME TAX EXPENSE. THE FOUNDATION IS NO LONGER SUBJECT TO EXAMINATION BY FEDERAL, STATE OR LOCAL TAX AUTHORITIES FOR PERIODS BEFORE 2009.</Explanation>
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      <Form990ScheduleIPartIII>
        <TypeOfGrant>TSFRE/NIH RESEARCH GRANT</TypeOfGrant>
        <NumberOfRecipients>1</NumberOfRecipients>
        <AmountOfCashGrant>166561</AmountOfCashGrant>
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      <Form990ScheduleIPartIII>
        <TypeOfGrant>TSFRE RESEARCH GRANT</TypeOfGrant>
        <NumberOfRecipients>2</NumberOfRecipients>
        <AmountOfCashGrant>79986</AmountOfCashGrant>
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      <Form990ScheduleIPartIII>
        <TypeOfGrant>TSFRE RESEARCH FELLOWSHIP</TypeOfGrant>
        <NumberOfRecipients>2</NumberOfRecipients>
        <AmountOfCashGrant>60000</AmountOfCashGrant>
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      <Form990ScheduleIPartIII>
        <TypeOfGrant>ALLEY-SHERIDAN SCHOLARSHIPS</TypeOfGrant>
        <NumberOfRecipients>9</NumberOfRecipients>
        <AmountOfCashGrant>22500</AmountOfCashGrant>
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      <Form990ScheduleIPartIII>
        <TypeOfGrant>TSFRE SIMULATION GRANT</TypeOfGrant>
        <NumberOfRecipients>1</NumberOfRecipients>
        <AmountOfCashGrant>9866</AmountOfCashGrant>
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      <Form990ScheduleIPartIV>
        <Identifier>PROCEDURE FOR MONITORING GRANTS IN THE U.S.:</Identifier>
        <ReturnReference>PART I, LINE 2:</ReturnReference>
        <Explanation>SCHEDULE I, PART I, LINE 2: EACH TSFRE GRANT PROJECT IS THOROUGHLY EVALUATED AND SCORED BY THREE TSFRE RESEARCH COMMITTEE REVIEWERS. THE RESEARCH REVIEWERS HAVE BEEN APPOINTED BY THE TSFRE PRESIDENT AND APPROVED BY THE TSFRE BOARD OF DIRECTORS, AND SPECIALIZE IN THORACIC SURGERY. THE GRANT APPLICANT IS REQUIRED TO SUBMIT HIS/HER APPLICATION INCLUDING CV, HIS/HER MENTOR'S CV, RESEARCH DESCRIPTION, PHOTO, AND THREE LETTERS OF RECOMMENDATION FROM THE APPLICANT'S SUPERIOR AT THE INSTITUTION OF WHICH THEY ARE APPLYING THE RESEARCH. THE LETTERS OF RECOMMENDATION MUST COME FROM DEPARTMENT CHAIRS, PROGRAM DIRECTORS, OR SPONSORS AT THE INSTITUTION IN WHICH THE RESEARCH OCCURS. THE APPLICANT'S SPONSOR'S CV IS ALSO EVALUATED. EACH TSFRE GRANT PAYMENT IS ISSUED TO THE INSTITUTION, NOT THE INDIVIDUAL. EACH SUBSEQUENT GRANT PAYMENT IS ISSUED AFTER THE APPLICANT SUBMITS A VALID PROGRESS REPORT, AND AFTER THE INSTITUTION SUPPLIES A SIGNED FINANCIAL PROGRESS REPORT VALIDATING THE EXPENSES.</Explanation>
      </Form990ScheduleIPartIV>
    </IRS990ScheduleI>
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      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION A, LINE 3</ReturnReference>
        <Explanation>THE SOCIETY OF THORACIC SURGEONS (STS) OF CHICAGO, ILLINOIS, MAINTAINS THE BOOKS AND RECORDS OF THE ORGANIZATION AND PERFORMS OTHER RELATED MANAGERIAL AND ADMINISTRATIVE FUNCTIONS FOR WHICH IT IS COMPENSATED.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 11</ReturnReference>
        <Explanation>THE 990 IS REVIEWED BY THE ADMINISTRATIVE STAFF OF THE MANAGEMENT COMPANY (STS) AND IS THEN PROVIDED TO THE TREASURER, AND THEN GOVERNING BODY, FOR FINAL REVIEW BEFORE IT IS FILED.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 12C</ReturnReference>
        <Explanation>TSFRE HAS A FORMAL CONFLICT OF INTEREST POLICY. ALL BOARD AND COMMITTEE MEMBERS ARE REQUIRED TO SIGN THE POLICY AND DISCLOSE CONFLICTS ANNUALLY. THE SIGNED POLICY AND DISCLOSURES ARE SENT TO TSFRE ADMINISTRATION. THEY ARE RECORDED AND MONITORED PERIODICALLY THROUGHOUT THE YEAR. IF THERE IS A CONFLICT, IT IS BROUGHT TO THE ATTENTION OF THE BOARD PRESIDENT FOR FURTHER ACTION. THE BOARD PRESIDENT READS A DISCLOSURE STATEMENT AT THE BEGINNING OF EACH BOARD MEETING.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 18</ReturnReference>
        <Explanation>FORM 990 IS AVAILABLE TO THE PUBLIC UPON REQUEST AT THE ADMINISTRATIVE OFFICES OF THE ORGANIZATION'S MANAGEMENT COMPANY (STS), AND ON THE FOUNDATION'S WEBSITE.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>GOVERNING DOCUMENTS, THE CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST AT THE ADMINISTRATIVE OFFICES OF THE ORGANIZATION'S MANAGEMENT COMPANY (STS).</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CHANGES IN NET ASSETS OR FUND BALANCES:</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 5:</ReturnReference>
        <Explanation>NET UNREALIZED LOSSES ON INVESTMENTS: -57,752.</Explanation>
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