1. Department of Anesthesiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
2. Division of Neurology, Department of Medicine, Taipei City Hospital, Ren-Ai Branch, Taipei, Taiwan
3. School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
4. Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
5. Institute of Clinical Medicine, National Cheng Kung University, Tainan, Taiwan
6. School of Medicine, National Defense Medicine Center, Taipei, Taiwan
7. School of Nursing, Fooyin University, Kaohsiung, Taiwan