1. Rollins School of Public Health, Department of Behavioral Sciences and Health Education, Atlanta, Georgia
2. Emory Center for AIDS Research, Atlanta, Georgia
3. Emory University School of Medicine, Department of Pediatrics (Division of Infectious Diseases, Epidemiology and Immunology), Atlanta, Georgia
4. School of Medicine, Department of Pediatrics, University of Alabama, Birmingham, Birmingham, Alabama
5. School of Public Health, Department of Health Behavior, University of Alabama, Birmingham, Alabama
6. School of Medicine, Department of Medicine, Division of Infectious Diseases, University of Alabama, Birmingham, Alabama