1. From the Department of Neurology (S.N.G., K.-H.W., T.F., M.A.W., J.L., T.S., S.L.C.); Division of Cardiovascular Medicine (J.S., L.K.), Department of Internal Medicine, University of Utah; Department of Neurology (J.S., L.K., T.S., S.L.C.); Geriatric Research Education and Clinical Center (T.S.), George E. Whalen Department of Veterans Affairs Medical Center; and Department of Pathology (T.S.), University of Utah, Salt Lake City.