1. VA Cooperative Studies Program Palo Alto Coordinating Center, VA Palo Alto Healthcare SystemMountain ViewCAUSA
2. VA Minneapolis Health Care SystemMinneapolisMNUSA
3. Department of PsychiatryUniversity of MinnesotaMinneapolisMNUSA
4. VA Cooperative Studies Program West Haven Coordinating Center, VA Connecticut Healthcare SystemWest HavenCTUSA
5. Statistical Center for HIV/AIDS Research and Prevention (SCHARP)Vaccine and Infectious Disease DivisionFred Hutchinson Cancer Research CenterSeattleWAUSA
6. Bronx Veterans Medical Research CenterNew YorkNYUSA
7. Icahn School of Medicine at Mount SinaiNew YorkNYUSA
8. William S. Middleton Memorial Veterans HospitalMadisonWIUSA
9. University of Wisconsin School of Medicine and Public HealthMadisonWIUSA
10. VA Cooperative Studies Program Clinical Research Pharmacy Coordinating CenterAlbuquerqueNMUSA
11. Louis Stokes Cleveland VAMCClevelandOHUSA
12. Case Western Reserve University School of MedicineClevelandOHUSA
13. Washington DC VA Medical CenterWashingtonDCUSA
14. Georgetown University School of MedicineWashingtonDCUSA
15. Department of Pathology and Laboratory MedicinePerelman School of Medicine, University of PennsylvaniaPhiladelphiaPAUSA