1. University of Colorado Anschutz Medical Center, Denver, Colorado
2. David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
3. VA Medical Center White River Junction, White River Junction, Vermont, and University of Connecticut School of Medicine, Farmington, Connecticut
4. Cleveland Clinic, Cleveland, Ohio
5. VA Puget Sound Health Care System, Seattle, Washington
6. New Langone Health, New York, New York
7. Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
8. New York University Grossman School of Medicine, New York, New York
9. VA Medical Center, White River Junction, Vermont, and Geisel School of Medicine at Dartmouth, Hanover, New Hampshire