1. Division of HIV, Infectious Diseases and Global Medicine, University of California, San Francisco, CA;
2. Centre for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya;
3. Infectious Diseases Research Collaboration, Kampala, Uganda;
4. Division of Biostatistics and Epidemiology, School of Public Health, University of California, Berkeley, CA;
5. Division of Prevention Sciences, Department of Medicine, University of California, San Francisco, San Francisco, CA;
6. Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, CA; and
7. Department of Medicine, Makerere University, Kampala, Uganda.