^○Akira Tomokuni¹, Hiroshi Wada¹, Shogo Kobayashi^1,2, Kei Asukai¹, Hirofumi Akita¹, Hidenori Takahashi¹, Yusuke Takahashi¹, Yoshitomo Yanagimoto¹, Tomoyuki Matsunaga¹, Keijiro Sugimura¹, Kazuyoshi Yamamoto¹, Masayoshi Yasui¹, Takeshi Omori¹, Hiroshi Miyata¹, Masayuki Ohue¹, Masahiko Yano¹, Masato Sakon¹ (1.Department of Surgery, Osaka International Cancer Institute, Osaka, Japan, 2.Department of Gastroenterological Surgery, Osaka University, Osaka Japan)

^○Satoshi Katagiri^1,2, Shun-ichi Ariizumi², Yoshihito Kotera², Akiko Oomori², Shingo Yamashita², Takaaki Kato², Akira Nemoto², Shunsuke Onisawa¹, Mie Hamano¹, Hiroto Egawa², Tatsuo Araida¹, Masakazu Yamamoto² (1.Department of Surgery, Division of Gastroenterological Surgery, Tokyo Women's Medical University Yachiyo Medical Center,Chiba, Japan, 2.Depaetment of Surgery, Institute of Gastroenterology, Tokyo Women`s Medical University, Tokyo, Japan)

^○Shohei Komatsu¹, Masahiro Kido¹, Motofumi Tanaka¹, Hirochika Toyama¹, Kimihiko Ueno¹, Tetsuo Ajiki¹, Kazuki Terashima², Yusuke Demizu³, Tomoaki Okimoto², Takumi Fukumoto¹ (1.Department of Surgery, Division of Hepato-Biliary-Pancreatic Surgery, Kobe University Graduate School of Medicine, 2.Hyogo Ion Beam Medical Center, 3.Department of Radiation Oncology, Hyogo Ion Beam Medical Center Kobe Proton Center)

^○Kosuke Matsui, Morihiko Ishizaki, Hideyuki Matsushima, Hidehiko Hishikawa, Tatsuma Sakaguchi, Richi Nakatake, Kentaro Inoue (Department of Surgery, Kansai Medical University)