^○Yoshifumi Morita, Takanori Sakaguchi, Ryo Kitajima, Satoru Furuhashi, Ryota Kiuchi, Makoto Takeda, Takanori Hiraide, Yasushi Shibasaki, Hirotoshi Kikuchi, Hiroya Takeuchi (Second Department of Surgery, Hamamatsu University School of Medicine, Shizuoka, Japan)

^○Ryuta Shintakuya, Masaru Sasaki, Atsushi Nakamitsu, Yuji Imamura, Mohei Kouyama, Tatsuya Tazaki, Yoichi Sugiyama, Shinnosuke Uegami, Yasuko Kameda, Sho Tazuma, Kensuke Shimbara, Kohei Miyashita (Department of Surgery, Hiroshima General Hospital, Hiroshima, Japan)

^○Morihiko Ishizaki, Kosuke Matsui, Richi Nakatake, Hideyuki Matsushima, Tatsuma Sakaguchi, Masaki Kaibori (Department of Surgery, Kansai Medical University, Osaka, Japan)

^○Mitsuru Tashiro¹, Suguru Yamada¹, Yoshiyasu Katoh¹, Nobutake Tanaka¹, Daishi Morimoto¹, Haruyoshi Tanaka¹, Tomonari Asano¹, Masaya Suenaga¹, Hideki Takami¹, Yukiko Niwa¹, Masamichi Hayashi¹, Tsutomu Fujii², Yasuhiro Kodera¹ (1.Department of Gastroenterological Surgery, Nagoya University, Nagoya, Japan, 2.epartment of Surgery and Science, Toyama University, Toyama, Japan)

^○Takahiro Einama, Makoto Nishikawa, Takuji Noro, Mayumi Hoshikawa, Suefumi Aosasa, Junji Yamamoto (Department of Surgery, National Defense Medical College, Saitama, Japan)

^○Daisaku Yamada, Hidetoshi Eguchi, Yoshifumi Iwagami, Tadafumi Asaoka, Takehiro Noda, Koichi Kawamoto, Kunihito Gotoh, Shogo Kobayashi, Masaki Mori, Yuichiro Doki (Department of Gastroenterological Surgery, Osaka University, Osaka, Japan)