1. From the Cooperative Studies Program Coordinating Center (K.T.S.), Hines VA Hospital, Hines, Ill; Midwest Center for Health Services and Policy Research (K.T.S., D.M.H.), Hines VA Hospital, Hines, Ill; Feinberg School of Medicine (K.T.S., L.C., C.L.), Chicago, Ill; VA Information Resource Center (K.T.S., D.M.H.), Hines, Ill; Tucson VA Medical Center (D.A.M.), Tucson, Ariz; University of Arizona (D.A.M.), Tucson, Ariz; Stanford University School of Medicine (M.A.H., P.G.B.), Stanford, Calif; VA...