^○Shinichi Sekine, Katsuhisa Hirano, Kazuto Shibuya, Isaku Yoshioka, Takuya Nagata, Tsutomu Fujii (Department of Surgery & Science, Toyama University, Toyama, Japan)

^○Minoru Oshima, Keiichi Okano, Hironobu Suto, Yasuhisa Ando, Hiroyuki Matsukawa, Bunpei Nishiura, Yumi Furuichi, Yukiko Wada, Eisuke Asano, Takayoshi Kishino, Hisashi Usuki, Yasuyuki Suzuki (Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan)

^○Yuichi Nakaseko, Yosuke Inoue, Atsushi Oba, Shoichi Irie, Yoshihiro Ono, Takafum Sato, Yoshihiro Mise, Takeaki Ishizawa, Hiromichi Ito, Yu Takahashi, Akio Saiura (Department of Gastroenterological Surgery, Cancer Institute Hospital Japanese Foundation for Cancer Research, Tokyo, Japan)

^○Shigeki Nakagawa, Yo-ichi Yamashita, Hirohisa Okabe, Katsunori Imai, Hidetoshi Nitta, Akira Chikamoto, Hideo Baba (Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan)

^○Masaharu Tada, Etsuro Hatano, Toshihiro Okada, Yasukane Asano, Naoki Uyama, Kazuhiro Suzumura, Ikuo Nakamura, Seikan Hai, Kenjiro Iida, Hideaki Sueoka, Hideaki Iwama, Hiroshi Nishida, Shinjiro Tamagawa, Jiro Fujimoto (Department of Surgery, Hyogo College of Medicine)

^○Hirofumi Kamachi, Tatsuya Orimo, Yousuke Tsuruga, Kenji Wakayama, Akihisa Nagatu, Shingo Shimada, Hideki Yokoo, Ryouichi Goto, Toshiya Kamiyama, Akinobu Taketomi (Department of Gastroenterological Surgery 1, Hokkaido University, Sapporo, Japan)