1. UVRI-IAVI HIV Vaccine Program, Entebbe, Uganda
2. Ghent University International Centre for Reproductive Health, Ghent, Belgium
3. School of Public Health, Makerere University College of Health Sciences, Kampala, Uganda
4. IAVI, New York, NY, USA
5. Department of Epidemiology and Biostatistics, University of California at San Francisco, San Francisco, CA, USA