1. Virginia Commonwealth University and Central Virginia Veterans Healthcare System Richmond VA
2. Yale University Medical Center New Haven CT
3. University of Pennsylvania Medical Center Philadelphia PA
4. Dallas Veterans Affairs Medical Center Dallas TX
5. Mayo Clinic Arizona Phoenix AR
6. University of California, San Francisco San Francisco CA
7. Mayo Clinic Rochester Rochester MN
8. University of Alberta Edmonton AB Canada
9. Emory University Atlanta GA
10. Mercy Medical Center Baltimore MD
11. University of Toronto Toronto ON Canada