Affiliation: | 1. Department of Radiology, JoongAng University Hospital, JoongAng University College of Medicine, Seoul, Republic of Korea;2. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea;3. Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea;4. Department of Neurosurgery, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Republic of Korea |