Affiliation: | (1) Department of Neurosurgery, Chuncheon Sacred Heart Hospital, Hallym University and Graduate School of Gangwon University, Chuncheon, Gangwon, South Korea;(2) Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, South Korea;(3) Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bungdang-gu, Seongnam, Gyeonggi, 463-707, South Korea;(4) Department of Neurosurgery, Soonchunhyang University Hospital, Seoul, South Korea; |