1. From the Kansas City VA Medical Center and Center on Aging, The University of Kansas Medical Center (P.W.D., D.M.R.), Kansas City, Kan; Durham VA Medical Center and Department of Medicine, Duke University Medical Center (R.D.H., H.H., B.H., T.K.D.), the Center for Clinical Health Policy Research and Department of Community and Family Medicine, Duke University (G.P.S.), Durham, NC; and the Kansas Health Institute (B.L.), Topeka, Kan.