Affiliation: | 1. National Institute for Medical Research, Isamilo Road, P.O. Box 1462, Mwanza, Tanzania.; 2. MRC/UVRI Uganda Research Unit on AIDS, P.O. Box 49, Entebbe, Uganda.; 3. London School of Hygiene and Tropical Medicine, London, United Kingdom.; 4. Mwanza Intervention Trials Unit, P.O. Box 11936, Mwanza, Tanzania.; 5. Weill Buganda School of Medicine, Mwanza, Tanzania.; 6. Weill Cornell Medical College, New York, NY, United States of America.; University of Oxford, KENYA, |