1. The Fenway Institute, Fenway Health, Boston, Massachusetts.
2. Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, Massachusetts.
3. Department of Internal Medicine, Mount Sinai Hospital, New York, New York.
4. Department of Psychiatry, Harvard Medical School/Massachusetts General Hospital, Boston, Massachusetts.
5. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts.
6. Division of Infectious Disease, Harvard Medical School/Beth Israel Deaconess Medical Center, Boston, Massachusetts.