Affiliation: | 1. Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan;2. Department of Biliary‐Pancreatic Surgery, Fujita Health University, Aichi, Japan;3. Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan;4. Department of Surgery, Teikyo University School of Medicine, Tokyo, Japan |