1. Department of Surgery, Duke University, Durham, North Carolina, USA
2. Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
3. Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
4. Division of Medical Virology, Department of Pathology, University of Cape Town, Cape Town, South Africa
5. National Health Laboratory Services, Johannesburg, South Africa
6. Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of KwaZulu Natal, Durban, South Africa
7. HIV Virology Section, Center for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
8. MRC Antibody Immunity Research Unit, University of Witwatersrand, Johannesburg, South Africa
9. Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
10. Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA
11. Department of Immunology, Duke University, Durham, North Carolina, USA
12. Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, USA
13. Department of Medicine, Duke University, Durham, North Carolina, USA