1. Department of Defense Walter Reed Program‐Nigeria, Abuja, Nigeria
2. Walter Reed Army Institute of Research, U.S. Military HIV Research Program, Silver Spring, MD, USA
3. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA
4. Institute of Human Virology, University of Maryland, Baltimore, MD, USA
5. Population Council Nigeria, Abuja, Nigeria
6. Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
7. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
8. Institute of Human Virology Nigeria, Abuja, Nigeria