1. From the Department of Internal Medicine (J.R.R., D.M.B., J.C., N.K., T.R.F.), the Department of Neurology (L.M.B.), and the Robert Wood Johnson Clinical Scholars Program (D.M.B., J.C., N.K.), Yale University School of Medicine; and the Clinical Epidemiology Research Center (D.M.B., J.C., T.R.F.), the Medical Service (D.M.B., J.C., T.R.F.), and the Neurology Service (L.M.B.), VA Connecticut Healthcare System, West Haven, Conn.