1. From Department of Veterans Affairs Rehabilitation Outcomes Research Center (H.J., Y.Z., D.M.R., D.C.C., S.S.W., W.B.V., G.C.Y., P.W.D.), Gainesville, Fla; Division of Biostatistics (Y.Z., S.S.W.), University of Florida College of Medicine, Gainesville, Fla; Department of Veterans Affairs Medical Center (D.M.R.), Kansas City, Mo and Health, Policy and Management, University of Kansas Medical Center, Kansas City, Ks; Department of Epidemiology and Health Policy Research (W.B.V.), University of...