1. Botswana University of Pennsylvania Partnership, Gaborone, Botswana.
2. Department of Biostatistics and Epidemiology, Rutgers University, New Brunswick, New Jersey, USA.
3. Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
4. Molecular Division, BARC-SA and Lancet Laboratories, Johannesburg, South Africa.
5. Office of the Global AIDS Coordinator, US Department of State, Philadelphia, Pennsylvania, USA.
6. Division of Allergy and Infectious Diseases, University of Washington School of Medicine, Seattle, Washington, USA.
7. Asociación Civil Impacta Salud y Educación, Lima, Perú.
8. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
9. Department of Medicine (Infectious Diseases), School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.