1. Department of Surgery, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8606, Japan
2. Tada Tomohiro institute of Gastroenterology and proctology, Saitama, Japan
3. Department of Surgical Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
4. Department of Gastroenterology, Graduate School of Medicine, Nagoya University, Nagoya, Japan
5. Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan
6. Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
7. AI medical service Inc., Tokyo, Japan