1. Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
2. Department of Neurological Surgery, Taichung Veterans General Hospital, Taichung, Taiwan
3. Department of Neurological Surgery, Jan-Ai Hospital, Taichung City, Taiwan
4. School of Medicine, National Yang-Ming University, Taipei, Taiwan
5. Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
6. Cancer Center, Taipei Veterans General Hospital, Taipei, Taiwan
7. Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
8. Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
9. Department of Neurosurgery, Cheng-Hsin General Hospital, Taipei, Taiwan
10. Department of Neurological Surgery, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan