1. From the Department of Radiology, Oita University Hospital, Yufu, Japan (H.K.); Department of Neurosurgery, Tsukuba University, Japan (Y.M.); Department of Neuroendovascular Therapy, St. Luke’s International Hospital, Tokyo, Japan (Y.N.); Department of Neurosurgery, Tokyo Metropolitan Neurological Hospital, Japan (K.T.); Department of Neurosurgery, Osaka City General Hospital, Japan (T.I.); Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry, and...