1. From Minneapolis Veterans Affairs (VA) Health Care System, and the Department of Medicine, University of Minnesota — both in Minneapolis (A.I.); Medical Service, Memphis VA Medical Center, and the Department of Preventive Medicine, University of Tennessee Health Science Center — both in Memphis (W.C.C.); the Cooperative Studies Program Coordinating Center, VA Boston Healthcare System (S.M.L., R.A.L., P.W., C.H., A.K., M.T.B., L.D.F., R.E.F.), the Department of Biostatistics, Boston University School of...