^○Masaru Tsuchiya¹, Tetsuya Maeda¹, Yuko Ito¹, Kazutaka Kimura¹, Yu Matsumoto¹, Rei Okada¹, Sho Yoshino¹, Yoshihisa Kubota¹, Toshio Katagiri¹, Jun Ishi², Akira Tamura², Yuichiro Otsuka¹, Kimihiko Funahashi¹, Hironori Kaneko¹ (1.Departmet of Gastroenterological Surgery, Toho University Omori Medical Center, 2.JCHO Tokyo Kamata medical center)

^○Tetsuya Maeda, Masaru Tsuchiya, Yuko Ito, Shou Yoshino, Yu Matsumoto, Kazutaka Kimura, Jun Ishii, Yoshihisa Kubota, Toshio Katagiri, Yuichirou Otsuka, Hironori Kaneko, Kimihiko Funahashi (Department of Surgery, division of general and gastroenterological Surgery, Toho University, Tokyo, Japan)

^○Yumi Suzuki, Kiyoshi Hiramatsu, Takashi Seki, Daisuke Kuga, Haruhisa Kawanami, Toshiyuki Arai (Department of Surgery, Anjo Kosei Hospital, Aichi, Japan)

^○Kenta Saito, Yoichi Matsuo, Goro Ueda, Yuichi Hayashi, Hiroyuki Imafuji, Tomoya Shamoto, Ken Tsuboi, Mamoru Morimoto, Hiroki Takahashi, Hideyuki Ishiguro, Shuji Takiguchi (Nagoya City University Graduate School of Medical Sciences Gastroenterological Surgery)

^○Kazuharu Igarashi, Yusuke Kumamoto, Yoshiki Fujiyama, Shuji Nakamoto, Nobuyuki Nishizawa, Shigenori Ei, Hiroshi Tajima, Takashi Kaizu, Keishi Yamashita, Masahiko Watanabe (Department of Surgery, Kitasato University, Kanagawa, Japan)

^○Hiroyuki Imafuji, Yoichi Matsuo, Gorou Ueda, Yuichi Hayashi, Kenta Saito, Tomoya Shamoto, Ken Tsuboi, Mamoru Morimoto, Hiroki Takahashi, Hideyuki Ishiguro, Shuji Takiguchi (Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Nagoya, Japan)