1. From the Departments of Neurosurgery (H.T., Y.M., Y.U., S.H., N.T., F.A., H.Suzuki, S.M., W.T.), Radiology (M.M.), and Innovative Neuro-Intervention Radiology (H.Sakaida), Mie University Graduate School of Medicine, Tsu, Mie, Japan; and the Department of Neurosurgery, Saiseikai Matsusaka General Hospital, Matsusaka, Mie, Japan (N.I.).