1. From the Departments of Cerebrovascular Medicine (T.H., M.H., N.F., K.T.), Neurology (H.Y., K.N.), Neurosurgery (T.S., J.C.T), and Pathology (H.I.-U.), National Cerebral and Cardiovascular Center, Suita, Japan; and Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan (J.K.).