1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
2. Rakai Health Sciences Program, Entebbe, Uganda
3. Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore
4. Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
5. Department of Mathematics, Imperial College, London, UK
6. Centers for Disease Control and Prevention, Kampala, Uganda
7. Division of Pathology, Johns Hopkins School of Medicine
8. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.