1. Stanford Center for Population Health Sciences, Stanford University School of Medicine, Palo Alto, California (L.S.P.)
2. Veterans Affairs Connecticut Healthcare System, West Haven, and Yale School of Medicine, New Haven, Connecticut (J.P.T., A.C.J.)
3. Icahn School of Medicine at Mount Sinai, New York, New York (K.S.)
4. James J. Peters Veterans Affairs Medical Center, Bronx, and Icahn School of Medicine at Mount Sinai, New York, New York (S.T.B.)
5. Harborview Medical Center, University of Washington School of Medicine, Seattle, Washington (K.C.)
6. Washington DC Veterans Affairs Medical Center and George Washington University School of Medicine and Health Sciences, Washington, DC (C.G.)
7. Veterans Affairs Greater Los Angeles Healthcare System and David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California (M.B.G.)
8. Atlanta Veterans Affairs Medical Center, Decatur, and Emory University School of Medicine, Atlanta, Georgia (D.R.)
9. Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas (M.C.R.)
10. Veterans Affairs North Texas Health Care System and University of Texas Southwestern Medical Center, Dallas, Texas (R.J.B.)
11. Yale School of Public Health and Yale School of Medicine, New Haven, Connecticut (R.D.)