1. International AIDS Vaccine Initiative, New York, New York.
2. Biostatistics Consultant, Arlington, Virginia.
3. IAVI Human Immunology Laboratory, Imperial College, London, United Kingdom.
4. Medical Research Council, Uganda Virus Research Institute, Uganda Research Unit on AIDS, Entebbe, Uganda.
5. Kenya AIDS Vaccine Initiative, University of Nairobi, Nairobi, Kenya.
6. Centre for Geographic Medicine Research—Coast, Kenya Medical Research Institute (KEMRI), Kilifi, Kenya.
7. Centre for Clinical Vaccinology and Tropical Medicine, University of Oxford, Headington, United Kingdom.