1. Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
2. Department of Epidemiology, The George Washington University, Washington, District of Columbia, USA.
3. Department of Pediatrics, University of California, Los Angeles, Los Angeles, California, USA.
4. Laboratory of Viral Diseases, NIAID, NIH, Bethesda, Maryland, USA.
5. Department of Virosciences, Erasmus Medical Center, Erasmus University Rotterdam, Rotterdam, the Netherlands.
6. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
7. Department of Medical Microbiology and Immunology, University of California, Davis, Davis, California, USA.
8. Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
9. Osel, Inc., Mountain View, California, USA.
10. Institut de Recerca de la SIDA IrsiCaixa i Unitat VIH, Universitat Autònoma de Barcelona, Universitat de Vic, Vic, Spain.
11. Burnet Institute, Melbourne, Australia.
12. Divison of AIDS, NIAID, NIH, Bethesda, Maryland, USA.
13. Division of Gerontology, Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA.