1 From the Departments of Neurology and Psychiatry, UMass Chan Medical School, Worcester (S.B.), and the Departments of Neurology (L.B., A.D.L.), Radiology (J.M.R.), and Psychiatry (C.A.), Massachusetts General Hospital, and the Departments of Neurology (L.B., A.D.L.), Radiology (J.M.R.), and Psychiatry (C.A.) Harvard Medical School, Boston - all in Massachusetts.