1. Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kita‑gun, Kagawa 761‑0793, Japan
2. Department of Internal Medicine, Yashima General Hospital, Takamatsu, Kagawa 761‑0113, Japan
3. Department of Internal Medicine, Kagawa Rosai Hospital, Marugame, Kagawa 763‑8502, Japan
4. Department of Radiology, Faculty of Medicine, Kagawa University, Kita‑gun, Kagawa 761‑0793, Japan
5. Department of Gastroenterological Surgery, Faculty of Medicine, Kagawa University, Kita‑gun, Kagawa 761‑0793, Japan
6. Department of Radiation Oncology, Kagawa University Hospital, Kita‑gun, Kagawa 761‑0793, Japan
7. Department of Clinical Examination, Faculty of Health Sciences, Kagawa Prefectural University of Health Sciences, Takamatsu, Kagawa 761‑0123, Japan