1. Department of Gastroenterology, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
2. Department of Surgery, Teikyo University School of Medicine, Tokyo, Japan
3. Department of Surgical Oncology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
4. Department of Gastroenterology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
5. Department of Gastroenterology, Graduate School of Institute Clinical Medicine, University of Tsukuba, Ibaraki, Japan
6. AI Medical Service Inc., Tokyo, Japan
7. Tada Tomohiro the Institute of Gastroenterology and Proctology, Saitama, Japan