1. From the Departments of Neurology (H. Dong, K.Y., M.M.W.), Pathology (M.B.), Medicine (P.J.C.), and Molecular and Integrative Physiology (M.M.W.), University of Michigan, Ann Arbor, MI; Departments of Neurology (H. Dong) and Geriatrics (H. Ding), The First Affiliated Hospital of Nanjing Medical University, Nanjing, China; and Departments of Medicine (P.J.C.) and Neurology (M.M.W.), Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI.