1. Department of Neurology, Kangwon National University College of Medicine, Chuncheon, Korea.
2. Department of Neurology, Kangwon National University Hospital, Chuncheon, Korea.
3. Department of Critical Care Medicine, Kangwon National University Hospital, Chuncheon, Korea.
4. Department of Neurosurgery, Kangwon National University College of Medicine, Chuncheon, Korea.
5. Department of Neurosurgery, Kangwon National University Hospital, Chuncheon, Korea.
6. Department of Radiology, Kangwon National University College of Medicine, Chuncheon, Korea.
7. Department of Biomedical Sciences and Engineering, National Central University, Taoyuan city, Taiwan.
8. Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea.