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        <PersonNm>P TRACY</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Y OZAKI</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>P LENTING</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>J WEITZ</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>J MORRISSEY</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>A FALANGA</PersonNm>
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        <PersonNm>D LILLICRAP</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>J LOPEZ</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>S REZENDE</PersonNm>
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        <PersonNm>A WOLBERG</PersonNm>
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        <PersonNm>P ANGCHAISUKSIRI</PersonNm>
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        <PersonNm>M MAKRIS</PersonNm>
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        <PersonNm>F PEYVANDI</PersonNm>
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        <PersonNm>J OLDENBURG</PersonNm>
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        <CurrentTaxYearMinus3YearsAmt>696799</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>957166</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1281571</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1294576</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus3YearsAmt>13322858</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1787185</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>10791090</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>2316517</CurrentTaxYearAmt>
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        <TotalAmt>0</TotalAmt>
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        <CurrentTaxYearMinus1YearAmt>274791</CurrentTaxYearMinus1YearAmt>
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        <FormAndLineReferenceDesc>PART III COLUMNS A, B AND C</FormAndLineReferenceDesc>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <InvestmentEarningsOrLossesAmt>22</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>261310</EndYearBalanceAmt>
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        <EndYearBalanceAmt>261288</EndYearBalanceAmt>
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        <EndYearBalanceAmt>260638</EndYearBalanceAmt>
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        <GrantsOrScholarshipsAmt>3684</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>260000</EndYearBalanceAmt>
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      <BoardDesignatedBalanceEOYPct>1.00000</BoardDesignatedBalanceEOYPct>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
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        <DepreciationAmt>299762</DepreciationAmt>
        <BookValueAmt>574311</BookValueAmt>
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        <DepreciationAmt>68593</DepreciationAmt>
        <BookValueAmt>134140</BookValueAmt>
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      <EquipmentGrp>
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        <DepreciationAmt>124758</DepreciationAmt>
        <BookValueAmt>127276</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>835727</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD DESIGNATED ENDOWMENTS WERE ESTABLISHED TO FUND SUPPORT OF A SPEAKER HONORARIA FOR LECTURES AT THE BIENNIAL CONGRESS AND TO FUND AWARDS GIVEN BY THE JTH EDITORS TO YOUNG INVESTIGATORS FOR BEST ARTICLE. $85,000 ESTABLISHED TO FUND SUPPORT OF SPEAKER HONORARIA OF TWO NAMED LECTURES AT THE BIENNIAL CONGRESS WAS RETURNED TO THE DONOR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>TEXT OF MODIFIED FOOTNOTE FIN 48 (ASC 740). INCOME TAX STATUS THE ORGANIZATION IS EXEMPT FROM FEDERAL INCOME TAX ON ITS MISSION-RELATED ACTIVITIES AS A NOT-FOR-PROFIT CHARITABLE ORGANIZATION UNDER INTERNAL REVENUE CODE 501(C)(3), AND IS CLASSIFIED AS A PUBLIC CHARITY. THE SOCIETY IS ALSO EXEMPT FROM NORTH CAROLINA INCOME AND FRANCHISE TAXES ON ITS MISSION-RELATED ACTIVITIES UNDER THE NORTH CAROLINA NON-PROFIT CORPORATION ACT. CERTAIN INCOME IS ALSO EXCLUDED FROM THE DEFINITION OF AN UNRELATED TRADE OR BUSINESS UNDER IRC SEC 512(B). FOR THE YEARS ENDED DECEMBER 31, 2016 AND 2015, THE SOCIETY 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>
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        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>1</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICE, FELLOWSHIPS</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>EHA-ISTH JOINT FELLOWSHIPS $57,345; CONTRIBUTION TO THE NATIONAAL FONDS TROMBOSE EN HEMOSTASE IN THE NETHERLANDS $260,077; $10,000 TO SUPPORT WOMEN'S HEALTH ISSUES INTERNATIONAL SYMPOSIUM; EXPENSES FOR MEETING HELD IN MONTPELLIER $1,110,745, AND RESIDUAL EXPENSES FOR AMSTERDAM CONGRESS $66,184</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>1</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICE, FELLOWSHIP</TypeOfActivitiesConductedTxt>
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        <TypeOfActivitiesConductedTxt>PROGRAM SERVICE</TypeOfActivitiesConductedTxt>
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        <RegionTxt>EUROPE</RegionTxt>
        <PurposeOfGrantTxt>ISTH AND EUROPEAN HAEMATOLOGY ASSOCIATION JOINT FELLOWSHIPS DEDICATED TO STUDY OF PHYSIOLOGY OF COAGULATION, BLEEDING OR THROMBOSIS.</PurposeOfGrantTxt>
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        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
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      <GrantsToOrgOutsideUSGrp>
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        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
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      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>EUROPE</RegionTxt>
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        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
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      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>REACH THE WORLD FELLOWSHIP SCIENTIST FROM CHINA - 4 MONTHS; FELLOW FROM MYANMAR - 4 MONTHS; AND FELLOW FROM MALAYSIA - 4 MONTHS.</TypeOfAssistanceTxt>
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        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>24000</CashGrantAmt>
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      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ISTH REACH-THE-WORLD FELLOWSHIP PROGRAM IS TARGETED TO EARLY-CAREER PROFESSIONALS FROM DEVELOPING COUNTRIES (COUNTRIES DESIGNATED AS 'DEVELOPING' BY THE CLASSIFICATION OF THE WORLD BANK). THE OBJECTIVE IS TO PROMOTE ADVANCED KNOWLEDGE AND EXPERTISE IN ONE OR ALL OF THE FOLLOWING AREAS RELATED TO THROMBOSIS AND HEMOSTASIS: MEDICAL CARE; LABORATORY METHODS; AND RESEARCH. ISTH REIMBURSES AIRFARE AND PROVIDES A HOUSING AND PER DIEM STIPEND OF $2,000 PER MONTH TO ALLOW THE FELLOW TO TRAVEL AND TO STUDY AT A HOST INSTITUTE. IN 2016 ONE FELLOW FROM CHINA COMPLETED HIS FOUR MONTH FELLOWSHIP IN THE USA,ONE FELLOW FROM MYANMAR WAS FUNDED FOR A FELLOWSHIP IN THE UK AND ANOTHER FELLOW FROM MALAYSIA WAS FUNDED TO STUDY IN AUSTRALIA. ALSO ISTH CONTINUED THE PARTNERSHIP WITH THE EUROPEAN HAEMATOLOGY ASSOCIATION TO FUND A JOINT FELLOWSHIP FOR A TWO-YEAR PERIOD, PROVIDING SEED GRANT FUNDS DEDICATED TO THE STUDY OF PHYSIOLOGY OF COAGULATION, BLEEDING OR THROMBOSIS AND MAY BE USED TO SUPPORT SALARY, SMALL EQUIPMENT, SUPPLIES AND/OR TRAVEL NECESSARY FOR THE RESEARCH PROJECT.</ExplanationTxt>
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      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <FormAndLineReferenceDesc>PART IV, LINE 14A</FormAndLineReferenceDesc>
        <ExplanationTxt>ISTH CONTRACTED WITH COLLOQUIUM, PROFESSIONAL CONGRESS ORGANIZERS LOCATED IN PARIS, FRANCE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY HAS FOUR CLASSES OF MEMBERSHIP: REGULAR, ASSOCIATE, EMERITUS AND ACADEMY.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERS ELECT 15 DIRECTORS TO THE BOARD OF DIRECTORS KNOWN AS THE COUNCIL.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BYLAWS MAY BE AMENDED OR REPEALED AND NEW BYLAWS ADOPTED BY THE AFFIRMATIVE VOTE OF TWO-THIRDS OF THE MEMBERS VOTING, EITHER BY MAIL OR IN PERSON AT A REGULAR MEETING OF THE MEMBERSHIP, PROVIDED THE PROPOSED CHANGE HAS BEEN SUBMITTED TO THE MEMBERSHIP AT LEAST THREE (3) MONTHS PRIOR TO THE MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE DIRECTOR AND TREASURER OF THE CORPORATION REVIEW THE FORM 990 WHICH IS THEN MADE AVAILABLE TO THE INTERNATIONAL BOARD OF DIRECTORS PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL VOTING MEMBERS OF ISTH COUNCIL,ALL CHAIRS OF SSC SCIENTIFIC SUBCOMMITTEES AND SPEAKERS AT ISTH AND SSC MEETINGS ARE REQUIRED TO SUBMIT DISCLOSURE OF INTEREST/LOYALTY STATEMENTS ANNUALLY WHICH ARE KEPT ON FILE AT HEADQUARTERS. ALL MEDICAL JOURNAL AUTHORS SUBMIT COI DISCLOSURES KEPT ON FILE BY THE EDITORIAL OFFICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION FOR ALL HIGHLY COMPENSATED STAFF IS ROUTINELY REVIEWED AND APPROVED BY EXEC COMMM OF THE BOARD BASED ON COMPARABLE DATA FOR SIMILAR POSITIONS IN SIMILAR ORGANIZATIONS FOR SIMILAR LONGEVITY, WITH WRITTEN DOCUMENTATION IN PERSONNEL FILE AND PAYROLL RECORDS. PERSONNEL EXPENSES ARE REPORTED ANNUALLY TO THE BOARD AND APPROVED AS PART OF THE BUDGET. OFFICERS AND DIRECTORS DO NOT RECEIVE COMPENSATION FOR THEIR SERVICES. PROFESSORS F. ROSENDAAL AND P. REITSMA RECEIVE A STIPEND AS CO-EDITORS IN CHIEF OF JTH. W. AGENO, C. MCLINTOCK, Y. OSAKI AND F. PEYVANDI RECEIVE AN ASSOC. EDITORIAL HONORARIUM. M. MAKRIS, F. ROSENDAAL, S. WATSON AND A. WOLBERG RECEIVED A SPEAKER STIPEND FOR THE SSC MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>PRIOR YEARS' 990S ARE AVAILABLE ON GUIDESTAR.ORG.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY'S NAME AND ADDRESS OF REGISTERED OFFICE/AGENT ARE AVAILABLE TO THE PUBLIC ON THE NC SECRETARY OF STATE WEB SITE: HTTP://WWW.SECRETARY.STATE.NC.US. THE BYLAWS AND MISSION ARE POSTED ON THE ISTH WEBPAGE. FINANCIAL STATEMENTS, THE ARTICLES OF INCORPORATION, FORM 1023 AND THE CONFLICT OF INTEREST POLICY ARE AVAILABLE BY REQUEST TO ISTH HEADQUARTERS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>RESTRICTED FUNDS RETURNED TO DONOR -85,000.</ExplanationTxt>
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