1. Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129
2. Ragon Institute of MGH, MIT, and Harvard and Division of AIDS, Harvard Medical School, Charlestown, Massachusetts 02129
3. Vaccine and Infectious Disease Institute, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109
4. Center for Cancer Research, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129
5. Division of Comparative Pathology, New England Regional Primate Research Center, Harvard Medical School, Southborough, Massachusetts 01772
6. Transplantation Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129
7. Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115
8. Institucio Catalana de Recerca i Estudis Avancats, Barcelona, Spain
9. Irsicaixa Foundation, Badalona, Spain