1. Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852‑8523, Japan
2. Department of Gastroenterology and Hepatology, Nagasaki University Hospital, Nagasaki 852‑8501, Japan
3. Department of Multidisciplinary Internal Medicine, Division of Gastroenterology and Nephrology, Tottori University Faculty of Medicine, Yonago, Tottori 683‑8504, Japan