1. School of Nursing, National Yang-Ming University
2. Nursing Department, Taipei Medical University Hospital, Taipei, Taiwan
3. Department of Anesthesiology, Lotung Poh-Ai Hospital, Yi-lan, Taiwan
4. Department of Neurosurgery, Taichung Veteran General Hospital, Taichung, Taiwan
5. Department of Anesthesiology, Taipei Medical University Hospital, Taipei, Taiwan
6. School of Nursing, Mackay Medical College, Taipei, Taiwan