1. Department of Gastrointestinal Surgery, Division of Cancer Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920‑8641, Japan
2. Department of Gastroenterological Surgery, Ishikawa Prefectural Central Hospital, Kanazawa, Ishikawa 920‑8530, Japan
3. Division of Education for Global Standard, Institute of Liberal Arts and Science, Kanazawa University, Kanazawa, Ishikawa 920‑1192, Japan
4. Central Research Resource Branch, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa 920‑1192, Japan
5. Department of Surgery, Fukui Prefectural Hospital, Fukui 910‑0846, Japan