Affiliation: | (1) Neurosurgical Service, Akita University Hospital, 1-1-1 Hondo, 010 Akita, Japan;(2) Department of Radiology and Nuclear Medicine, Research Institute for Brain and Blood Vessels-Akita, 010 Akita, Japan;(3) Department of Neurology, Research Institute for Brain and Blood Vessels-Akita, 010 Akita, Japan |