1. Department of Interdisciplinary Program in Biomedical Science, Graduate School, Soonchunhyang University, Asan, Korea
2. Department of Neurosurgery, Soonchunhyang University Seoul Hospital, Seoul, Korea
3. Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
4. Department of Neurosurgery, Soonchunhyang University Cheonan Hospital, Cheonan, Korea