1. Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC
2. Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
3. Department of Biochemistry, National Defense Medical Center, Taipei, Taiwan, ROC
4. Department of Neurological Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC