1. Department of Coloproctological Surgery, Faculty of Medicine, Juntendo University, Tokyo 113‑8421, Japan
2. Department of Next‑Generation Cell and Immune Therapy, Faculty of Medicine, Juntendo University, Tokyo 113‑8421, Japan
3. Department of Gastrointestinal and Hepato‑Biliary‑Pancreatic Surgery, Nippon Medical School, Tokyo 113‑8603, Japan
4. Department of Gastroenterological Surgery, Faculty of Medicine, Fukuoka University, Fukuoka 814‑0180, Japan