1. The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
2. National Institute of Allergy and Infectious Diseases, National Institutes of Health, Baltimore, Maryland, USA.
3. U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA.
4. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA.
5. Makerere University Walter Reed Project, Kampala, Uganda.
6. Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand.
7. Kenya Medical Research Institute (KEMRI), Nairobi, Kenya.
8. United States Army Medical Research Directorate-Africa/Kenya (USAMRD-A/K), Jericho, Kenya.
9. Henry Jackson Foundation Medical Research International (HJFMRI), Kericho, Kenya.