1. Centre for the AIDS Programme of Research in South Africa (CAPRISA), Durban 4013, South Africa.
2. Department of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba R3E 0J9, Canada.
3. Department of Retrovirology, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand.
4. U.S. Military HIV Research Program, Henry M. Jackson Foundation for the Advancement of Military Medicine, Walter Reed Army Institute, Silver Spring, MD 20817, USA.
5. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA.
6. Division of Medical Virology and Institute of Infectious Diseases and Molecular Medicine, University of Cape Town and National Health Laboratory Service, Cape Town 7925, South Africa.
7. Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
8. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892–9806, USA.
9. Kenyan AIDS Vaccine Initiative, Nairobi 00202, Kenya.
10. Department of Medical Microbiology, University of Nairobi, Nairobi 00202, Kenya.
11. Uganda Virus Research Institute–International AIDS Vaccine Initiative HIV Vaccine Program, Plot 51-59, Nakiwogo Road, Entebbe, Uganda.
12. Department of Epidemiology and Biostatistics, Makerere University, P.O. Box 7062, Kampala, Uganda.
13. Department of Immunology and Molecular Biology, Makerere University, P.O. Box 7062, Kampala, Uganda.
14. Department of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
15. University Health Network, Toronto, Ontario M5G IL7, Canada.
16. National Health Laboratory Services, Cape Town 8005, South Africa.
17. South East Asia Research Collaboration in HIV (SEARCH), The Thai Red Cross AIDS Research Centre, Bangkok 10330, Thailand.
18. University of Amsterdam, 1000 GG Amsterdam, Netherlands.
19. Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.
20. Department of Epidemiology, Columbia University, New York, NY 10032, USA.