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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>55138</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>350000</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>true</AccountantCompileOrReviewInd>
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      <FSAuditedInd>false</FSAuditedInd>
      <AuditCommitteeInd>true</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleA documentId="990A">
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        <CurrentTaxYearMinus1YearAmt>377700</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>438859</CurrentTaxYearAmt>
        <TotalAmt>816559</TotalAmt>
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        <CurrentTaxYearMinus1YearAmt>377700</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>438859</CurrentTaxYearAmt>
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      <PublicSupportTotal509Amt>816559</PublicSupportTotal509Amt>
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        <CurrentTaxYearMinus2YearsAmt>0</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>377700</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>438859</CurrentTaxYearAmt>
        <TotalAmt>816559</TotalAmt>
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      <PublicSupportCY509Pct>1.00000</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.00000</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00000</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
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    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Amended return information</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I LINE 8 - PROGRAM SERVICE REVENUE:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF REVENUE ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $379,872, WHILE THE AMENDED FILING REPORTS THE CORRECT TOTAL OF $438,709. PART I LINE 16B - TOTAL FUNDRAISING EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL FUNDRAISING EXPENSES ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $10,403, WHILE THE AMENDED FILING REPORTS THE CORRECT TOTAL OF $245. PART I LINE 17 - OTHER EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF OTHER EXPENSES ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $389,635, WHILE THE AMENDED FILING REPORTS THE CORRECT TOTAL OF $383,721. PART I LINE 20 - TOTAL ASSETS:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL ASSETS ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $690,115, WHILE THE AMENDED FILING REPORTS THE CORRECT TOTAL OF $748,952. PART I LINE 20 - TOTAL LIABILITIES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL LIABILITIES ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $22,627, WHILE THE AMENDED FILING REPORTS THE CORRECT TOTAL OF $25,862. PART III LINE 4A - STATEMENT OF PROGRAM SERVICE ACCOMPLISHMENTS:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF THE ORGANIZATIONS STATEMENT OF PROGRAM SERVICE ACCOMPLISHMENTS ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED PROGRAM SERVICE REVENUE AND EXPENSES OF $379,872 AND $279,881 RESPECTIVELY, WHILE THE AMENDED FILING REPORTS THE CORRECT TOTALS OF $438,709 AND $278,135 RESPECTIVELY. PART VIII LINE 2 - PROGRAM SERVICE REVENUE:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF PROGRAM SERVICE REVENUE ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $379,872. THE AMENDED FILING CORRECTS THE ORIGINAL REPORTING WITH THE CORRECT TOTAL OF $296,194 IN PROJECT INCOME AND $142,515 IN SYMPOSIUM SPONSORSHIP INCOME. PART IX LINE 11G - OTHER PROGRAM EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF OTHER PROGRAM EXPENSES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN LISTED PROGRAM SERVICE EXPENSES OF $250,412, MNGT AND GENERAL EXPENSES OF $71,277, AND FUNDRAISING EXPENSE OF $10,403. THE AMENDED RETURN LISTS PROGRAM SERVICE EXPENSES OF $240,815 AND MNGT AND GENERAL EXPENSES OF $75,358. PART IX LINE 14 - INFORMATION TECHNOLOGY:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF OTHER PROGRAM EXPENSES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN LISTED PROGRAM SERVICE EXPENSES OF $250,412, MNGT AND GENERAL EXPENSES OF $71,277, AND FUNDRAISING EXPENSE OF $10,403. THE AMENDED RETURN LISTS PROGRAM SERVICE EXPENSES OF $240,815 AND MNGT AND GENERAL EXPENSES OF $75,358. PART IX LINE 19 - CONFERENCES, CONVENTIONS, AND MEETINGS:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF CONFERENCES, CONVENTIONS, AND MEETINGS EXPENSE REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN LISTED PROGRAM SERVICE EXPENSES OF $26,244. THE AMENDED RETURN LISTS PROGRAM SERVICE EXPENSES OF $34,095. PART IX LINE 23 - INSURANCE:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF INSURANCE EXPENSES. THE ORIGINAL RETURN LISTED MNGT AND GENERAL EXPENSES OF $0. THE AMENDED RETURN LISTS MNGT AND GENERAL EXPENSES OF $1,389. PART IX LINE 24 - OTHER EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF OTHER EXPENSES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN LISTED MNGT AND GENERAL SUPPLIES EXPENSES OF $0. THE AMENDED RETURN CORRECTLY LISTS THESE EXPENSES AT $7,328. THE ORIGINAL RETURN ALSO LISTED MNGT AND GENERAL OTHER BUSINESS EXPENSES OF $7,922. THE AMENDED RETURN CORRECTLY LISTS $2,558 OF MNGT AND GENERAL OTHER BUSINESS EXPENSES AND $245 OF FUNDRAISING OTHER BUSINESS EXPENSES. THE AMENDED RETURN REMOVES THE REPORTING OF NEWSLETTER &amp; PUBLISHING EXPENSES AS THESE WERE INCORRECTLY CHARACTERIZED ON THE ORIGINAL FILING. PART X LINE 4: ACCOUNTS RECEIVABLE, NET:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF ACCOUNTS RECEIVABLE, NET REPORTED ON THE AMENDED RETURN. THE ORIGINAL FILING REPORTED $5,000, WHILE THE AMENDED RETURN CORRECTLY REPORTS $58,837. PART X LINE 9 - PREPAID EXPENSES AND DEFERRED CHARGES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF PREPAID EXPENSES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $0, WHILE THE AMENDED RETURN CORRECTLY REPORTS $5,000. PART X LINE 16 - TOTAL ASSETS:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL ASSETS REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $690,115, WHILE THE AMENDED RETURN CORRECTLY REPORTS $748,952. PART X LINE 17 - ACCOUNTS PAYABLE AND ACCRUED EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF ACCOUNTS PAYABLE AND ACCRUED EXPENSES AS REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $13,477, WHILE THE AMENDED RETURN CORRECTLY REPORTS $25,862. PART X LINE 19 - DEFERRED REVENUE:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF DEFERRED REVENUE REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $9,150, WHILE THE AMENDED RETURN REPORTS $0. PART X LINE 26 - TOTAL LIABILITIES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL LIABILITIES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $22,627, WHILE THE AMENDED RETURN CORRECTLY REPORTS $25,862. PART X LINE 27 - NET ASSETS WITHOUT DONOR RESTRICTIONS:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF NET ASSETS WITHOUT DONOR RESTRICTIONS REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $667,488, WHILE THE AMENDED RETURN CORRECTLY REPORTS $723,090. PART X LINE 32 - TOTAL ASSETS OR FUND BALANCES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL NET ASSETS OR FUND BALANCES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $667,488, WHILE THE AMENDED RETURN CORRECTLY REPORTS $723,090. PART X LINE 33 - TOTAL LIABILITIES AND NET ASSETS/FUND BALANCES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL LIABILITIES AND NET ASSETS/FUND BALANCES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $690,115, WHILE THE AMENDED RETURN CORRECTLY REPORTS $748,952. PART XI LINE 1 - TOTAL REVENUE:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL REVENUE REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $380,022, WHILE THE AMENDED RETURN CORRECTLY REPORTS $438,859. PART XI LINE 2 - TOTAL EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF TOTAL EXPENSES REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTED $389,635, WHILE THE AMENDED RETURN CORRECTLY REPORTS $383,721. PART XI LINE 3 - REVENUE LESS EXPENSES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF REVENUE LESS EXPENSE REPORTED ON THE AMENDED RETURN. THE ORIGINAL RETURN REPORTS ($9,613), WHILE THE AMENDED RETURN CORRECTLY REPORTS $55,138. PART XI LINE 9: OTHER CHANGES IN NET ASSETS OR FUND BALANCES:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF OTHER CHANGES IN NET ASSETS OR FUND BALANCES REPORTED ON THE AMENDED RETURN. THE REVIEW CORRECTLY ACCOUNTED FOR A TRANSFER OF REMAINING FUNDS HELD BY MASS GENERAL HOSPITAL TO THE PARKINSON STUDY GROUP. THE ORIGINAL RETURN REPORTED $359,149, WHILE THE AMENDED RETURN CORRECTLY REPORTS $350,000. PART XI LINE 10 - NET ASSETS OR FUND BALANCES AT END OF YEAR:A REVIEW COMPLETED OF FINANCIAL STATEMENTS SUBSEQUENT TO ORIGINAL FILING RESULTING IN CORRECTION TO REPORTING OF NET ASSETS OR FUND BALANCES AT END OF YEAR REPO</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Members or stockholder classes and rights Part VI line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, SECTION A LINE 6:THERE ARE TWO MEMBERSHIP CLASSES WITHIN THE ORGANIZATION CONSISTING OF VOTING MEMBERS AND ASSOCIATE MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Member election for additional members Part VI line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, SECTION A, LINE 7A:THE VOTING MEMBERS OF THE ORGANIZATION ELECT THE MEMBERS OF THE EXECUTIVE COMMITTEE AS TERM LIMITS EXPIRE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, SECTION B, LINE 11B:EXECUTIVE COMMITTEE MEMBERS ARE PROVIDED A COPY OF FORM 990 AND A PRESENTATION IS MADE AT A COMMITTEE MEETING PRIOR TO SUBMISSION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, SECTION B, LINE 12C:DISCLOSURE FORMS ARE REQUIRED TO BE COMPLETED BY EXECUTIVE COMMITTEE MEMBERS AND MEMBERS OF STANDING COMMITTEES AND WORKING GROUPS. THESE FORMS ARE UPDATED WHEN THERE IS A CHANGE IN THE STATUS OF A PSG MEMBER REGARDING A POTENTIAL CONFLICT OF INTEREST. DISCLOSURES ARE REVIEWED BY LEGAL COUNSEL AS NEEDED. THOSE DEEMED TO BE IN VIOLATION OR POTENTIAL VIOLATION ARE REVIEWED BY MEMBERS OF THE STANDARDS COMMITTEE. RECOMMENDATIONS AS TO THE MANAGEMENT OF THESE CONFLICTS ARE THEN FORWARDED BY THE CHAIR OF THE STANDARDS COMMITTEE TO THE EXECUTIVE COMMITTEE FOR ANY ACTION NECESSARY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 availability to public Part VI line 18</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, SECTION C, LINE 18:COPIES OF FORM 990 AND THE ORGANIZATIONS FINANCIAL STATEMENTS ARE AVAILABLE FOR PUBLIC INSPECTION ONLINE WITH THE IRS AND THE MASSACHUSETTS ATTORNEY GENERAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing documents etc available to public Part VI line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, SECTION C, LINE 19:COPIES OF GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE FOR PUBLIC INPECTION ONLINE AT THE PSG WEBSITE AND WITH THE MASSACHUSETTS ATTORNEY GENERAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Explanation of other changes in net assets or fund balances Part XI line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>ORGANIZATION RECEIVED REMAINING BALANCE OF FUNDS HELD BY MASS GENERAL HOSPITAL VIA BANK TRANSFER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>List of other fees for services expenses Part IX line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART IX, LINE 11G:PROGRAM SERVICE EXPENSES- STIPENDS - 142,212- AWARDS - 75,000- MEDICAL EDITING SERVICE - 13,200- PROGRAM SUPPORT PAID TO UOR - 10,403TOTAL OTHER PROGRAM SERVICE EXPENSES - 240,815MANAGEMENT GENERAL &amp; ADMINISTRATIVE- ADMINISTRATIVE SUPPORT - 75,358TOTAL OTHER MANAGEMENT GENERAL &amp; ADMINISTRATIVE - 75,358TOTAL OTHER FEES FOR SERVICES ON FORM 990, PART IX, LINE 11G, COL A - 316,173</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III response or note to any other line in Part III</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART III, LINE 1:TO MAKE SUBSTANTIAL ADVANCES IN OUR UNDERSTANDING AND TREATMENT OF PARKINSONS DISEASE AND OTHER PARKINSONIAN DISORDERS; WORKING AS AN EFFICIENT, COLLABORATIVE NETWORK OF TALENTED CLINICIANS AND SCIENTISTS AND OPERATING UNDER A SUPPORTIVE AND PROACTIVE LEADERSHIP WITH BROAD BACKING FROM GOVERNMENT, INDUSTRY, FOUNDATION, AND PATIENT STAKE-HOLDERS IN THE PARKINSON COMMUNITY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VII response or note to any other line in Part VII</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VII, SECTION A:IN ACCORDANCE WITH IRS GUIDELINES REPORTABLE COMPENSATION INCLUDES COMPENSATION FOR INDEPENDENT CONTRACTOR SERVICES TO THE FILING ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>