1. Veterans Affairs Medical Center, Minneapolis, and University of Minnesota, Minneapolis, Minnesota
2. Veterans Affairs San Diego Healthcare System and University of California, San Diego
3. University of Colorado-Denver and Health Sciences Center
4. GRECC, Durham Veterans Affairs Medical Center and Duke University Medical Center, Durham, North Carolina
5. University of Rochester, New York
6. Veterans Affairs Medical Center, St. Louis, Missouri
7. Hines Veterans Affairs Medical Center, Hines, llinois
8. Veterans Affairs Maryland Health Care System and University of Maryland School of Medicine, Baltimore
9. Veterans Affairs Medical Center Puget Sound, Seattle, Washington
10. Vanderbilt University Medical Center, Nashville, Tennessee
11. Veterans Affairs Ann Arbor Healthcare System and University of Michigan Medical School, Ann Arbor
12. National Institutes of Allergy and Infectious Diseases, Bethesda, Maryland
13. Veterans Affairs Medical Center, Tampa, Florida
14. VA New York Harbor Healthcare System and New York University School of Medicine, New York City
15. Veterans Affairs Medical Center and Boston University, Massachusetts
16. Birmingham Veterans Affairs Medical Center and University of Alabama at Birmingham
17. Lexington VA Medical Center and University of Kentucky School of Medicine, Kentucky
18. Veterans Affairs Palo Alto Health Care System, California
19. Baylor College of Medicine, Houston, Texas
20. Northport Veterans Affairs Medical Center, Northport, New York
21. Veterans Affairs Medical Center, Albuquerque, New Mexico
22. University of Texas Health Sciences Center, San Antonio, Texas
23. Department of Veterans Affairs Cooperative Studies Program Coordinating Center, West Haven, Conneticut
24. Merck Sharp & Dohme Corp., Whitehouse Station, New Jersey
25. Department of Veterans Affairs Cooperative Studies Program Clinical Research Pharmacy Coordinating Center, Albuquerque, New Mexico