1. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts.
2. The Fenway Institute, Fenway Community Health Boston, Massachusetts.
3. Harvard Medical School AIDS Initiative in Vietnam, Ho Chi Minh City, Vietnam.
4. Center for Applied Research on Men and Health, Ho Chi Minh City, Vietnam.
5. Centre for Promotion of Quality of Life (Life Centre), Ho Chi Minh City, Vietnam.
6. Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.
7. Department of Global Health and Population, Harvard School of Public Health, Boston, Massachusetts.
8. Department of Psychiatry, Harvard Medical School/Massachusetts General Hospital, Boston, Massachusetts.