1. Kenya Medical Research Institute, Kisumu, Kenya
2. Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA
3. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
4. Center for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
5. Desmond Tutu HIV Centre, Cape Town, South Africa
6. Perinatal HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa
7. Malawi College of Medicine – Johns Hopkins University Research Project, Blantyre, Malawi
8. Division of AIDS, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA