1. Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts.
2. Harvard Medical School, Boston, Massachusetts.
3. The Fenway Institute, Fenway Health, Boston, Massachusetts.
4. Division of General Pediatrics, Boston Children's Hospital, Boston, Massachusetts.
5. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
6. Department of Sociology, University of Virginia, Charlottesville, Virginia.
7. Division of Alcohol and Drug Abuse, McLean Hospital, Belmont, Massachusetts.
8. Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts.