1. Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center , Boston, Massachusetts , USA
2. Ragon Institute of MGH, MIT and Harvard , Cambridge, Massachusetts , USA
3. Division of Infectious Diseases, Department of Medicine, University of Nebraska Medical Center , Omaha, Nebraska , USA
4. Department of Epidemiology, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina , USA
5. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center , Seattle, Washington , USA
6. Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Rockville, Maryland , USA
7. Department of Epidemiology and Biostatistics, School of Public Health, Texas A&M University , College Station, Texas , USA
8. Department of Integrative Physiology, University of Colorado , Boulder, Colorado , USA
9. Department of Microbiology, University of Illinois , Urbana, Illinois , USA
10. Department of Medicine, University of Arizona , Tucson, Arizona , USA
11. Division of Infectious Diseases and International Health, University of Virginia , Charlottesville, Virginia , USA
12. Department of Medicine, University of Washington , Seattle, Washington , USA
13. Children's Hospital and Medical Center, University of Nebraska Medical Center , Omaha, Nebraska , USA
14. Department of Family Medicine, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina , USA
15. Department of Public Health Sciences, Clemson University , Clemson, South Carolina , USA
16. Department of Medicine, University of Florida , Gainesville, Florida , USA
17. Department of Medicine, Northwestern University Feinberg School of Medicine , Chicago, Illinois , USA
18. Center for Sexual Health Promotion, Indiana University School of Public Health–Bloomington , Bloomington, Indiana , USA
19. Department of Medicine, University of Kentucky , Lexington, Kentucky , USA
20. Department of Medicine, Charles R. Drew University of Medicine and Science , Los Angeles, California , USA
21. Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine , Atlanta, Georgia , USA
22. Department of Laboratory Medicine, University of Washington , Seattle, Washington , USA