1. Division of STD Prevention, State Laboratory Institute, Massachusetts Department of Public Health, Boston and Department of Family Medicine and Community Health, University of Massachusetts Medical School, Worcester
2. Department of Family Medicine and Community Health, University of Massachusetts Medical School, Worcester
3. Division of STD Prevention, State Laboratory Institute, Massachusetts Department of Public Health, Boston
4. Hampden County Correctional Center, Ludlow, Massachusetts; Department of Medicine, Baystate Medical Center, Springfield, Massachusetts