| Affiliation: | 1. Department of Gastroenterological Surgery, Graduate School of Medicine, Yokohama City University, Yokohama, Japan;2. Department of Surgery, Teikyo University Chiba Medical Center, Chiba, Japan;3. Department of Surgery, Gastroenterological Center, Yokohama City University, Yokohama, Japan;4. Department of Surgery, Yokosuka Kyosai Hospital, Yokosuka, Japan;5. Department of Surgery, Yokohama City Hospital, Yokohama, Japan;6. Department of Surgery, Yokohama Ekisaikai Hospital, Yokohama, Japan;7. Department of Surgery, Saiseikai Yokohamashi Nanbu Hospital, Yokohama, Japan;8. Department of Surgery, Ito Municipal Hospital, Ito, Japan;9. Department of Surgery, Saiseikai Wakakusa Hospital, Yokohama, Japan;10. Department of Biostatistics, Center for Novel and Exploratory Clinical Trials, Yokohama City University, Yokohama, Japan |
