1. Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Neurology, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Neurosurgery, Good Morning Hospital, Pyeongtaek, Korea.
4. Department of Neurosurgery, Soonchunhyang University School of Medicine, Seoul, Korea.
5. Department of Neurosurgery, Bundang Jesaeng General Hospital, Seongnam, Korea.
6. Department of Neurosurgery, Inha University College of Medicine, Incheon, Korea.
7. Department of Neurosurgery, Wonkwang University School of Medicine, Iksan, Korea.
8. Department of Neurosurgery, Hanyang University College of Medicine, Guri, Korea.
9. Department of Neurology, Inje University College of Medicine, Goyang, Korea.
10. Department of Neurology, Hallym University College of Medicine, Anyang, Korea.
11. Department of Neurology, Yonsei University College of Medicine, Seoul, Korea.
12. Department of Neurology, University of Ulsan College of Medicine, Seoul, Koera.
13. Department of Neurosurgery, Gyeongsang National University School of Medicine, Incheon, Korea.
14. Department of Neurology, Inha University College of Medicine, Incheon, Korea.