1. Department of Anesthesiology; Osaka City University Medical School; Osaka Japan
2. Operating Theatre; Osaka Rosai Hospital; Sakai Japan
3. Department of Anesthesia; First Towakai Hospital; Osaka Japan
4. Department of Surgical Oncology; Osaka City University Medical School; Osaka Japan
5. Department of Anesthesiology and Intensive Care Medicine; Kochi Medical School; Kochi Japan