1. From the Duke University Medical Center, Durham, NC (B.A.S.); Duke Clinical Research Institute, Durham, NC (X.Z., E.D.P., A.F.H.); VA Palo Alto Healthcare System, Palo Alto, CA (P.A.H.); VA Boston Healthcare System, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.L.B.); Brigham and Women's Hospital and Harvard Medical School, Boston, MA (C.P.C.); and Ronald Reagan UCLA Medical Center, Los Angeles, CA (G.C.F.).