1. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
2. Medical Scientist Training Program, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
3. Programme National de la Lutte Contre le SIDA, Kinshasa, Democratic Republic of Congo
4. Programme National de la Lutte Contre le Paludisme, Kinshasa, Democratic Republic of Congo
5. Kinshasa School of Public Health, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
6. Division of Infectious Diseases, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA