Affiliation: | 1. Department of Neurosurgery, Neurovascular Center of New Korea Hospital, Gimpo, Gyeonggi Province, South Korea 2. Department of Neurosurgery, Seoul National University College of Medicine, Bundang Hospital, 300 Gumi-dong, Bungdang-gu, Seongnam, Gyeonggi, 463-707, South Korea 3. Department of Neurology, Seoul National University College of Medicine, Bundang Hospital, Seongnam, South Korea
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