1. HIV Center for Clinical and Behavioral Studies, Department of Psychiatry, New York State Psychiatric Institute and Vagelos College of Physicians & Surgeons, Columbia University, New York, USA
2. Aaron Diamond AIDS Research Center, Columbia University, New York, USA
3. Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
4. Mailman School of Public Health, ICAP at Columbia University, New York, USA
5. Division of Epidemiology & Biostatistics, School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa
6. Department of Health Services, Policy & Practice, Brown University School of Public Health, Providence, USA
7. Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, USA
8. National STI, HIV/AIDS Control Program, Maputo, Mozambique
9. Department of Pediatrics, Vagelos College of Physicians & Surgeons, Columbia University, New York, USA