1. Theoretical Biology and Biophysics, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
2. Division of Medical Virology & Institute of Infectious Diseases and Molecular Medicine, University of Cape Town and NHLS, Cape Town, South Africa
3. Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
4. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
5. Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
6. Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
7. National Institute for Communicable Diseases, Johannesburg, South Africa
8. New Mexico Consortium, Los Alamos, New Mexico, USA