1. Department of Health, Behavior and Society; Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
2. Division of General Internal Medicine, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, New York.
3. At the time of the study, was at the Special Projects of National Significance, HIV/AIDS Bureau, Health Resources and Services Administration, Rockville, Maryland. Now at the Johns Hopkins School of Medicine, Baltimore, Maryland.
4. Departments of Pediatrics and Epidemiology and Public Health, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida.
5. AIDS Research Institute, University of California, San Francisco, California.
6. At the time of the study was at the Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland. Now at Veterans Affairs, National Serious Mental Illness Treatment Research Evaluation Center, Ann Arbor, Michigan.
7. Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia.