1. Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea
2. Department of Radiology, Seoul National University College of Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea
3. College of Pharmacy, Natural Product Research Institute, Seoul National University, Sillim-dong, Gwanak-gu, Seoul, Korea
4. Department of Neurosurgery, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Jinju, Korea
5. Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Jongno-gu, Seoul, Korea
6. Department of Pathology, Seoul National University College of Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea
7. Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea