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, California, USA.
4. Laboratory of Viral Diseases, NIAID, NIH, Bethesda, Maryland, USA.
5. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
6. Department of Medical Microbiology and Immunology, University of California, Davis, Davis, California, USA.
7. Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
8. Osel, Inc., Mountain View, California, USA.
9. Division of Gerontology, Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA.
10. Institut de Recerca de la SIDA IrsiCaixa i Unitat VIH, Universitat Autònoma de Barcelona, Universitat de Vic, Catalonia, Spain.
11. Burnet Institute, Melbourne, Australia.
12. Divison of AIDS, NIAID, NIH, Bethesda, Maryland, USA.
13. Department of Infectious Diseases, Hospital Universitario Ramon y Cajal, Madrid, Spain.
14. Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA.