1. Department of Neurosurgery, Soonchunhyang University Seoul Hospital, Seoul, Korea.
2. Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea.
3. Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Neurosurgery, Chungnam National University Hospital, Daejeon, Korea.
5. Department of Neurosurgery, Gachon University Gil Medical Center, Incheon, Korea.
6. Department of Internal Medicine, School of Medicine, Chung-Ang University, Seoul, Korea.
7. Department of Biostatistics, Soonchunhyang University Seoul Hospital, Seoul, Korea.
8. Clinical Research Institute, Seoul National University Hospital, Seoul, Korea.
9. Hypoxia/Ischemia Disease Institute, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.
10. Advanced Institutes of Convergence Technology, Suwon, Korea.