From the Department of Neurology (T.C.C.), Behavioral Neurology and Neuropsychiatry Section, University of Colorado School of Medicine, Aurora; Department of Neurology (M.P.H.S.), Brigham and Women's Hospital; Department of Neurology (M.P.H.S., A.B.S., D.N.C.), Massachusetts General Hospital; and Harvard Medical School (M.P.H.S., A.B.S., D.N.C.), Boston, MA.