1. Department of Anesthesiology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan, R.O.C.
2. Department of Surgery, E‑Da Hospital/E‑Da Cancer Hospital, I‑Shou University, Kaohsiung 824, Taiwan, R.O.C.
3. Department of Medical Research, E‑Da Hospital/E‑Da Cancer Hospital, I‑Shou University, Kaohsiung 824, Taiwan, R.O.C.