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        <PersonNm>KEVIN KELLY</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
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        <FormAndLineReferenceDesc>PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL COMPENSATION IS PAID BY RELATED ORGANIZATION MASSACHUSETTS BIOTECHNOLOGY COUNCIL (MASSBIO). PRESIDENT COMPENSATION: THE EXECUTIVE COMMITTEE OF THE MASSBIO BOARD EMPLOYED AN EXECUTIVE COMPENSATION CONSULTANT IN 2019 TO EVALUATE MASSBIO CEO COMPENSATION AND TO RECOMMEND CHANGES BASED ON THEIR WORK. THAT STUDY RECOMMENDED CERTAIN CHANGES TO CEO COMPENSATION BASED ON COMPARABLE ORGANIZATIONS' COMPENSATION PRACTICES. MASSBIO ADOPTED THE RECOMMENDED CHANGES FOR 2019 AND 2020.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>MASSBIO'S BOARD TREASURER REVIEWS THE ORGANIZATION'S 990 AND PROVIDED HIS/HER RECOMMENDATION TO MASSBIO'S EXECUTIVE COMMITTEE FOR APPROVAL. COPIES TO THE 990 ARE AVAILABLE TO THE EXEC. COMMITTEE UPON REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL MASSBIO BOARD MEMBERS AND STAFF ARE REQUIRED TO SIGN THE CONFLICT OF INTEREST FORM ANNUALLY. MANAGEMENT TRACKS FORM SIGNING TO INSURE FULL COMPLIANCE. RELATED PARTY TRANSACTIONS ARE COMPILED AND DISCLOSED IN THE AUDITED FINANCIALS AND FORM 990 WHICH ARE REVIEWED BY THE BOARD OR BOARD COMMITTEES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>PROFESSIONAL SERVICES: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 205,981. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 205,981.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>MASSBIO'S BOARD OF DIRECTORS ASSUMES RESPONSIBILITY FOR OVERSIGHT OF THE AUDIT OF ITS FINANCIAL STATEMENTS AND THE SELECTION OF AN INDEPENDENT ACCOUNTANT.</ExplanationTxt>
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          <AddressLine1Txt>700 TECHNOLOGY SQUARE 5TH FLOOR</AddressLine1Txt>
          <CityNm>CAMBRIDGE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
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