1. Yale University, New Haven, Connecticut
2. VA Connecticut Healthcare System, West Haven, Connecticut
3. Icahn School of Medicine at Mt Sinai, New York, New York
4. Stanford University, Stanford, California
5. George Washington University, Washington, District of Columbia
6. Washington District of Columbia VA Medical Center, Washington, District of Columbia
7. University of California Los Angeles, Los Angeles, California
8. VA Greater Los Angeles Healthcare System, Los Angeles, California
9. University of Texas Southwestern, Dallas, Texas
10. Baylor College of Medicine, Houston, Texas
11. James J. Peters VA Medical Center, Bronx, New York
12. University of Washington, Seattle, Washington