1 From the Department of Neurology (A.B., G.V.H.), Brigham and Women's Hospital; and Department of Neurology (A.B.), Massachusetts General Hospital, Harvard Medical School, Boston.
2 From the Department of Neurology (A.B., G.V.H.), Brigham and Women's Hospital; and Department of Neurology (A.B.), Massachusetts General Hospital, Harvard Medical School, Boston. ghenderson@BWH.Harvard.edu.