1. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Consejo Nacional para el VIH y el SIDA, Santo Domingo, Dominican Republic
3. HIV Vaccine Research Unit, Instituto Dermatalógico y Cirugía de Piel Dr. Huberto Bogaert Díaz, Santo Domingo, Dominican Republic
4. Department of Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA