1. VA Boston Healthcare System; Boston MA USA
2. University of Cincinnati College of Medicine; Cincinnati OH USA
3. Boston University School of Medicine; Boston MA USA
4. Dana-Farber Cancer Institute; Boston MA USA
5. Kansas City Veterans Affairs Medical Center; Kansas City MO USA
6. VA Connecticut Healthcare System; West Haven CT USA
7. Atlanta VA Medical Center; Decatur GA USA
8. James A. Haley Veterans' Hospital; Tampa FL USA
9. Central Arkansas Veterans Healthcare System John L. McClellan Memorial Veterans Hospital; Little Rock AR USA
10. San Francisco VA Medical Center; San Francisco CA USA
11. Michael E. DeBakey VA Medical Center and Baylor College of Medicine; Houston TX USA
12. James Cancer Hospital at The Ohio State University Medical Center; Columbus OH USA
13. Harvard Medical School; Boston MA USA
14. VA Eastern Colorado Health Care System; Denver CO USA
15. VA Pittsburgh Healthcare System and University of Pittsburgh Medical Center; Pittsburgh PA USA
16. Indiana University School of Medicine; Indianapolis IN USA
17. VA Greater Los Angeles Healthcare System; Los Angeles CA USA