1. Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC 27710, USA.
2. Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA.
3. Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA.
4. Department of Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
5. Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA.
6. Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
7. Infectious Disease Research Institute, Seattle, WA 98102, USA.
8. National Institute for Communicable Diseases, Johannesburg 2131, South Africa.
9. Center for the AIDS Programme of Research in South Africa, University of KwaZulu-Natal, Durban 4013, South Africa.
10. Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
11. Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA.
12. Beth Israel Deaconess Medical Center, Boston, MA 02215, USA.
13. Department of Microbiology, Boston University School of Medicine, Boston, MA 02118, USA.
14. Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA.
15. Department of Pediatrics, Duke University School of Medicine, Durham, NC 27710, USA.