1. Center for Family Health Research in Zambia, Rwanda Zambia HIV Research Group, Lusaka, Zambia
2. Rwanda Zambia HIV Research Group, Emory University, School of Medicine, Atlanta, GA, USA
3. Centers for Disease Control and Prevention, Atlanta, GA, USA
4. Center for Family Health Research in Zambia, Rwanda Zambia HIV Research Group, Ndola, Zambia
5. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
6. IAVI, New York, NY, USA
7. Department of Epidemiology and Biostatistics, University of California at San Francisco, San Francisco, CA, USA