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        <NamePerson>Tomas Kirchhausen</NamePerson>
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      <Form990ScheduleJPartIII>
        <ReturnReference>Part I, Line 4b</ReturnReference>
        <Explanation>Children's Hospital Corporation, a related organization, made contributions to a supplemental non-qualified retirement plan for the following individuals: Carleen Brunelli $23,100 James Mandell $383,214 David Kirshner $54,708 Stuart Novick $109,080</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>Supplemental Information</Identifier>
        <ReturnReference>Part III</ReturnReference>
        <Explanation>Compensation from a Related Organization Part II Compensation provided by a related organization is for executive/employee services to Children's Hospital Corporation; not for trustee or officer service to Immune Disease Institute. Compensation Reported in Prior Form 990 Part II, Column F The compensation reported in Part II, Column B of this Schedule J (Form 990) is for the calendar year 2011 and a portion of it may have already been reported on a prior year Form 990 as deferred compensation. Compensation amounts in Column F reflects the compensation already reported in a prior return and needs to be taken into consideration to correct the overstatement of the cumulative compensation reported as paid to the individuals listed.</Explanation>
      </Form990ScheduleJPartIII>
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    <IRS990ScheduleN documentId="RetDoc1043100001">
      <LiquidationTable>
        <LiquidationDetail>
          <DescriptionOfAsset>All assets, Liabilities and Net Assets were merged into Children's Hospital Corporation</DescriptionOfAsset>
          <DateOfDistribution>2012-09-30</DateOfDistribution>
          <FMVOfAsset>13974732</FMVOfAsset>
          <MethodOfFMVDetermination>Book Value</MethodOfFMVDetermination>
          <EIN>042774441</EIN>
          <NameBusiness>
            <BusinessNameLine1>Children's Hospital Corporation</BusinessNameLine1>
          </NameBusiness>
          <AddressUS>
            <AddressLine1>300 Longwood Avenue</AddressLine1>
            <City>Boston</City>
            <State>MA</State>
            <ZIPCode>02115</ZIPCode>
          </AddressUS>
          <IRCSection>501(c)(3)</IRCSection>
        </LiquidationDetail>
      </LiquidationTable>
      <DirectorOfSuccessor>0</DirectorOfSuccessor>
      <EmployeeOfSuccessor>1</EmployeeOfSuccessor>
      <OwnerOfSuccessor>0</OwnerOfSuccessor>
      <ReceiveCompensation>0</ReceiveCompensation>
      <AssetsDistributed>1</AssetsDistributed>
      <RequiredToNotifyAG>1</RequiredToNotifyAG>
      <AGNotified>1</AGNotified>
      <LiabilitiesPaid>1</LiabilitiesPaid>
      <BondsOutstanding>0</BondsOutstanding>
      <BondLiabilitiesDischarged>0</BondLiabilitiesDischarged>
      <Form990ScheduleNPartIII>
        <Explanation>Part I, Line 2e: Frederick Alt, PhD</Explanation>
      </Form990ScheduleNPartIII>
      <Form990ScheduleNPartIII>
        <Explanation>Part I, Line 2e: Upon the merger of Immune Disease Institute (IDI) into Children's Hospital Corporation, IDI will become the Program in Cellular and Molecular Medicine at Children's Hospital. Fred Alt will serve as the program director.</Explanation>
      </Form990ScheduleNPartIII>
    </IRS990ScheduleN>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 6</ReturnReference>
        <Explanation>On December 24, 2008, the Board of Trustees of IDI and the members of the Board of Trustees of The Children's Medical Center Corporation (CMCC), a Massachusetts nonprofit corporation, entered into a five year affiliation agreement (the agreement) to make IDI CMCC's sixth multidisciplinary research program, the program in cellular and molecular medicine (the program). The effectuation of the affiliation was subject to naming CMCC as the sole corporate member of IDI, adoption by IDI of amended and restated articles of organization, adoption of amended and restated bylaws, and the modification of the IDI Board of Trustees. The date these conditions were satisfied is considered the "closing" date of the affiliation agreement. On February 20, 2009 (the closing date) pursuant to the affiliation agreement, IDI amended its articles of organization and bylaws to name CMC as its sole corporate member. The composition of IDI's Board of Trustees was amended such that CMCC has the authority to appoint the majority of trustees. On March 3, 2010, Immune Disease Institute changed their fiscal year end from June 30 to September 30.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 7a</ReturnReference>
        <Explanation>Children's Medical Center Corporation has the authority to appoint the majority of trustees of Immune Disease Institute, Inc.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 7b</ReturnReference>
        <Explanation>On December 24, 2008, the Board of Trustees of IDI and the members of the Board of Trustees of The Children's Medical Center Corporation (CMCC), a Massachusetts nonprofit corporation, entered into a five year affiliation agreement (the agreement) to make IDI CMCC's sixth multidisciplinary research program, the program in cellular and molecular medicine (the program). The effectuation of the affiliation was subject to naming CMCC as the sole corporate member of IDI, adoption by IDI of amended and restated articles of organization, adoption of amended and restated bylaws, and the modification of the IDI Board of Trustees. The date these conditions were satisfied is considered the "closing" date of the affiliation agreement. On February 20, 2009 (the closing date) pursuant to the affiliation agreement, IDI amended its articles of organization and bylaws to name CMC as its sole corporate member. The composition of IDI's Board of Trustees was amended such that CMCC has the authority to appoint the majority of trustees. On March 3, 2010, Immune Disease Institute changed their fiscal year end from June 30 to September 30.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 11</ReturnReference>
        <Explanation>The Form 990 was completed by the staff of The Children's Hospital Corporation. The return was reviewed by senior management of the Children's Hospital Corporation.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 12c</ReturnReference>
        <Explanation>Employees shall conduct business activities in a professional manner consistent with their fiduciary responsibilities to IDI and shall exercise particular care so that no detriment to IDI results from conflicts between their personal financial interests and those of IDI. An employee is considered to have a conflict of interest when the employee, or any of his family or associates: "has an existing or potential financial or other interest which impairs or might appear to impair the employee's independence of judgment in the discharge of his responsibilities to IDI," or "may receive a material, financial or other benefit from knowledge of information confidential to IDI." The "family" of an employee includes his or her spouse, parents, siblings, children and, if living in the same household, other relatives. An "associate' includes any person, trust or organization in which the employee or any member of his or her family "is a director, officer, employee, member, partner, or trustee," or "has a financial interest that enables him or her, acting alone or in conjunction with others, to exercise control or influence policy significantly," or "has any other material association." This policy is to be interpreted and applied in a manner that will best serve the interests of IDI. If an employee or other member of the IDI organization believes that he or she may have a conflict of interest, he or she shall promptly and fully disclose the conflict to the President. This will be documented using the Conflict of Interest Disclosure Form. The employee in question shall refrain from participating in the matter to which the conflict relates until that conflict question has been resolved. In some cases, however, it may be determined that, after full disclosure to those concerned, IDI's interests are best served by the participation of the employee despite the conflict. All employees and trustees are required to complete the conflict of interest disclosure form annually. If a conflict of interest is identified as a result of completing the disclosure or for any other reason, the employee (trustee) and the President will work to resolve the matter including taking whatever action is necessary to preclude the possibility that the identified conflict will impact on an IDI purchasing or business decision. The President will report the conflict to IDI's Board of Trustees. A further aspect of the IDI's conflict of interest policy is intended to assure the proper use of IDI's resources. In the absence of the appropriate written disclosure of conflict of interest and acceptable resolution thereof, no member of the IDI organization shall involve or utilize IDI personnel, resources or vendors in any manner to conduct personal business activities or to use them for personal financial benefit. This does not apply to the occasional use of the telephone or computer to deal with incidental family or personal matters. The routine use of IDI resources to conduct personal business outside of IDI's mission constitutes a breach of the NIH guidelines and is a violation of IDI's conflict of interest policy. The repeated violation of this policy by any individual is a basis for dismissal. IDI investigators at the level of instructor, assistant professor, and full professor are members of the Harvard Faculty of Medicine. As such they are required to file a conflict of interest statement with Harvard Medical School (HMS) on the Ecommons website each year in order to retain their academic appointment and conduct business with the University. Copies of the HMS policy, the form filed, and the statement on research sponsored by industry are available by request. A faculty member is considered to have a conflict of Interest when he/she, any of his/her family, or any associated entity possesses a financial interest in an activity which involves his/her responsibilities as a member of the Faculty of Medicine. Included in these responsibilities are all activities in which the faculty member is engaged in the areas of teaching, research, patient care and administration. The standing committee on conflicts of interest and commitment at HMS is responsible for reviewing the implementation of the policy on a regular basis and providing oversight to assure that the policy s applied consistently to all faculty.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 15</ReturnReference>
        <Explanation>All compensation for top management, officers and key employees is approved by the Board of Directors. IDI reviews several independent compensation surveys including the AIRI survey, TSG survey, and the Mass Bio-Counsel survey. All compensation for senior investigators, investigators and junior investigators is developed by comparables within the Longwood Medical Area for basic research scientists and approved by the Board of Directors.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section C, line 19</ReturnReference>
        <Explanation>Form 990, Part VI, Section C, Line 19: The Form 990, the Audited Financial Statements, and the Organization's governing documents are available upon request. The Audited Financial Statements are posted on the Organization's website. In addition, the Form 990 is available on the website of The Massachusetts Attorney General.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Changes in Net Assets or Fund Balances:</Identifier>
        <ReturnReference>Form 990, Part XI, line 5:</ReturnReference>
        <Explanation>Net unrealized gains on investments: 910,891. Merger with Children's Hospital Corporation -13,974,732. Total to Form 990, Part XI, Line 5: -13,063,841.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
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