1. American College of Physicians, Philadelphia, Pennsylvania (A.Q.)
2. Minneapolis Veterans Affairs Medical Center, Minneapolis, Minnesota (T.J.W.)
3. Oregon Health & Science University and Veterans Affairs Medical Center, Portland, Oregon (D.K.)
4. Virginia Mason Medical Center, Seattle, Washington (C.H.)
5. Massachusetts General Hospital, Boston, Massachusetts (M.J.B.)
6. University of Pennsylvania Health System, Philadelphia, Pennsylvania (M.A.F.)