1. Department of Social and Behavioral Sciences, Harvard School of Public Health, Boston, Massachusetts.
2. The Fenway Institute, Fenway Health, Boston, Massachusetts.
3. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts.
4. Department of Psychiatry, Harvard Medical School, Boston, Massachusetts.
5. Department of Biostatistics, Harvard School Public Health, Boston, Massachusetts.
6. Division of Adolescent and Young Adult Medicine, Children's Hospital, Boston, Massachusetts.
7. Channing Laboratory, Brigham & Women's Hospital, Boston, Massachusetts, and Harvard Medical School, Boston, Massachusetts.
8. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts.