1. From the Departments of Medicine (S.V.D.), Epidemiology (A.L.S., J.T., D.M.S.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; the Departments of Medicine (D.A.A., L.M.B., K.H.C., M.L., A.M.Y., J.M.A., J.A.S.), Psychiatry (M.B., D.F.D.), and Medical Ethics and Policy (K.G.V.) and the Department of Statistics, the Wharton School (D.S.S.), University of Pennsylvania, the Corporal Michael J. Crescenz Veterans Affairs Medical Center (D.A.A., K.H.C., K.G.V.), and the Department of Pediatrics,...