Affiliation: | 1. Department of Neurosurgery, Konyang University Hospital, Konyang University School of Medicine, Daejeon, Korea 2. Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, 135-710, Korea 3. Department of Radiology, Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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