^○Kumiko Akashi, Tomoki Ebata, Yukihiro Yokoyama, Tsuyoshi Igami, Takashi Mizuno, Junpei Yamaguchi, Syunsuke Onoe, Masato Nagino (Division of Surgial Oncology, Department of Surgery, Nagoya University Graduate School of Medicine)

^○Takuya Sakamoto, Yutaka Takeda, Yoshiaki Ohmura, Kenji Kawai, Kohei Murakami, Atsushi Naito, Yoshinori Kagawa, Toru Masuzawa, Atsushi Takeno, Kouhei Murata (Department of Surgery, Kansai Rosai Hospital, Hyogo, Japan)

^○Hiroyuki Nojima¹, Satoshi Kuboki¹, Hideyuki Yoshitomi¹, Katsunori Furukawa¹, Tsukasa Takayashiki¹, Shigetsugu Takano¹, Daisuke Suzuki¹, Nozomu Sakai¹, Shingo Kagawa¹, Takashi Mishima¹, Makoto Takahashi¹, Masaru Miyazaki², Masayuki Ohtsuka¹ (1.Department of Surgery, Chiba Univesrity, Chiba, Japan, 2.Digestive Diseases Center, International University of Health and Welfare, Mita Hospital, Tokyo, Japan)

^○Naoto Koike, Yuji Oshima (Department of Surgery, Seirei Sakura Citizen Hospital, Japan)

^○Norifumi Harimoto¹, Kei Hagiwara¹, Takahiro Yamanaka¹, Norihiro Ishii¹, Takamichi Igarashi¹, Akira Watanabe¹, Norio Kubo¹, Kenichirou Araki¹, Ken Shirabe¹, Hiroyuki Kuwano² (1.Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 2.Department of General Surgical Science, Graduate School of Medicine, Gunma University)

^○Yusuke Kumamoto, Takashi Kaizu, Hiroshi Tajima, Nobuyuki Nishizawa, Shigenori Ei, Masahiko Watanabe (Department of Surgery, Kitasato University, Kanagawa, Japan)