1. From the Department of Neurology (P.S.V., S.H.G., L.R.W., J.C.), University of Pittsburgh School of Medicine, Pa; State Key Laboratory of Medical Neurobiology (J.C.), Fudan University School of Medicine, Shanghai, China; and the Geriatric Research, Educational, and Clinical Center (S.H.G., J.C.), Veterans Affairs Pittsburgh Health Care System, Pa.