^○Taishi Yamane, Hiromitsu Hayashi, Hideaki Takeyama, Katsuhiro Ogawa, Toshiro Masuda, Shinichi Akaboshi, Yoshiaki Ikuta, Katsutaka Matsumoto, Kenichi Ogata, Hiroshi Takamori (Department of Surgery, Saiseikai-Kumamoto Hospital, Kumamoto, Japan)

^○Hideo Ota, Shigekazu Yokoyama, Kazuyuki Okada, Hiroshi Matsuno, Tomohira Takeoka, Ken Konishi, Mutsumi Fukunaga, Kenji Kobayashi (Department of Surgery, Hyogo Municipal Nishinomiya Hospital, Nishinomiya, Japan)

^○Seiichi Shimizu, Tsuyoshi Kobayashi, Masahiro Ohira, Hiroyuki Tahara, Shintaro Kuroda, Michinori Hamaoka, Hideki Ohdan (Department of gastroenterological and transplant Surgery, Hiroshima university, Hiroshima, Japan)

^○Daisuke Hokuto, Takeo Nomi, Takahiro Yoshikawa, Yasuko Matsuo, Takahiro Akahori, Satoshi Nishiwada, Kenji Nakagawa, Minako Nagai, Kota Nakamura, Naoya Ikeda, Masayuki Sho (Department of Surgery, Nara Medical University, Nara, Japan)

^○Toru Mizuguchi, Minoru Nagayama, Masafumi Imamura, Hiroshi Yamaguchi, Takayuki Nobuoka, Makoto Meguro, Yasutoshi Kimura, Ichirou Takemasa (Department of Surgery, Surgical Oncology & Science, Sapporo Medical University)

^○Masaru Koizumi, Akira Saito, Yoshiyuki Meguro, Hideyo Miyato, Masanobu Taguchi, Yuji Kaneda, Atsushi Miki, Kazuhiro Endo, Hideki Sasanuma, Yasunaru Sakuma, Atsushi Shimizu, Alan, K Lefor, Naohiro Sata (Department of Surgery, Jichi Medical University School of Medicine)