1. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia.
2. Division of Medical and Preventive Services, Fulton County Board of Health, Atlanta, Georgia.
3. Department of Medicine, Division of Infectious Diseases, School of Medicine, Emory University, Atlanta, Georgia.
4. HIV Epidemiology Department, Georgia Department of Public Health, Atlanta, Georgia.
5. Division of Epidemiology, Fulton County Board of Health, Atlanta, Georgia.