1. Section of Infectious Diseases, AIDS Program, Yale School of Medicine, New Haven, CT, USA
2. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
3. Department of Allied Health Sciences, Center for Health, Intervention and Prevention, University of Connecticut, Storrs, CT, USA
4. Asociación Civil Impacta Salud y Educación, Lima, Peru
5. Asociación Civil Vía Libre, Lima, Peru