| Affiliation: | 1. Department of Colorectal Surgery, National Cancer Centre Hospital East, Kashiwa, Japan;2. Department of Surgery, Toho University Ohashi Medical Centre, Tokyo, Japan;3. Department of Surgery, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan;4. Department of Colorectal Surgery, National Cancer Centre Hospital, Tokyo, Japan;5. Department of Colon and Rectal Surgery, Shizuoka Cancer Centre, Shizuoka, Japan;6. Department of Gastroenterological Surgery, Ishikawa Prefectural Central Hospital, Kanazawa, Japan;7. Department of Gastroenterological Surgery, National Hospital Organization Shikoku Cancer Centre, Matsuyama, Japan;8. Department of Biostatistics, Yokohama City University, Yokohama, Japan |
