1. Division of Clinical Physiology, Department of Translational Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
2. Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
3. Nagasaki University Hospital, Clinical Research Center, Nagasaki, Japan
4. Department of Anesthesiology and Intensive Care Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
5. Department of Dental Anesthesiology, Nagasaki University Hospital, Nagasaki, Japan
6. Fisher & Paykel Healthcare Ltd, Auckland, New Zealand.