1. Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo, Tokyo 113‑8655, Japan
2. Nihonbashi Muromachi Mitsui Tower Midtown Clinic, Tokyo 103‑0022, Japan
3. Department of Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo 113‑8677, Japan
4. Department of Gastrointestinal and Hepato‑Biliary‑Pancreatic Surgery, Nippon Medical School, Tokyo 113‑8602, Japan
5. 4Department of Gastrointestinal and Hepato‑Biliary‑Pancreatic Surgery, Nippon Medical School, Tokyo 113‑8602, Japan