1. HIV Monitoring Foundation, Amsterdam, The Netherlands.
2. Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium.
3. Kenya Medical Research Institute, Centre for Geographic Medicine Research–Coast, Kilifi, Kenya.
4. PharmAccess Foundation, Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands.
5. Kenya AIDS Vaccine Initiative, University of Nairobi, Nairobi, Kenya.
6. Coast Province General Hospital, Mombasa, Kenya.
7. Health Protection Agency, London, United Kingdom.
8. Nuffield Department of Clinical Medicine, University of Oxford, Oxford, United Kingdom.
9. Lancet Laboratories, Johannesburg, South Africa.
10. University of Washington, Seattle, Washington.
11. International AIDS Vaccine Initiative, New York, New York.
12. Department of Epidemiology and Biostatistics, University of California at San Francisco, San Francisco, California.
13. Centre for Infectious Disease Control, RIVM, Utrecht, The Netherlands.
14. Julius Center for Health Science and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.