Y Lai1, Y Chia1, C Wen2, H Hsu3, H Chang4, W Huang5. 1. Department of Anesthesiology, Kaohsiung Veterans General Hospital, Taiwan. 2. Department of Anesthesiology, Kaohsiung Veterans General Hospital, Taiwan. Electronic address: wennie945@gmail.com. 3. Division of Neurosurgery, Department of Surgery, Kaohsiung Veterans General Hospital, Taiwan. 4. Division of General Surgery, Department of Surgery, Critical Care Center and Cardiovascular Medical Center, Kaohsiung Veterans General Hospital, Taiwan. 5. Critical Care Center and Cardiovascular Medical Center, Kaohsiung Veterans General Hospital, Taiwan; Department of Physical Therapy, Fooyin University, Kaohsiung, Taiwan School of Medicine, National Yang-Ming University, Taipei, Taiwan.