1. Department of Neurological Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
2. Department of Pharmacology, National Defense Medical Center, Taipei, Taiwan, Republic of China
3. Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan, Republic of China
4. Department of Neurosurgery, Case Western Reserve University School of Medicine, Cleveland, OH, USA
5. Section of Neurosurgery, Department of Surgery, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan, Republic of China