^○Akihiro Murata, Sadatoshi Shimizu, Shintaro Kodai, Katsunobu Sakurai, Kohei Nishio, Yorihisa Urata, Kotaro Miura, Masahiko Kinoshita, Genya Hamano, Tetuzou Tashima, Souta Deguchi, Syuuhei Kushiyama, Yurika Iida, Daisuke Shirai, Akishige Kanazawa (Department of Hepato-Biliary-Pancreatic Surgery, Osaka City General Hospital, Osaka, Japan)

^○Seiko Miura, Nobuhiko Ueda, Yoritaka Fujii, Jun Fujita, Yasuto Tomita, Hideto Fujita, Shinichi Kinami, Takeo Kosaka (Department of General and Gastrointestinal Surgery, Kanazawa Medical University, Ishikawa, Japan)

^○Takashi Masuda, Toshifumi Matsumoto (Department of Gastroenterological Surgery, National Hospital Organization Beppu Medical Center)

^○Toshimasa Okada, Tomio Ueno, Syuumei Mineta, Yuko Okamoto, Mio Uraoka, Yuusaku Watanabe, Hisako Kubota, Masaharu Higasida, Atsushi Tsuruta, Yoshinori Fujiwara (Department of Digestive Surgery, Kawasaki Medical School, Okayama, Japan)

^○Yuji Ueda, Hidetoshi Eguchi, Koichi Kawamoto, Masamitsu Konno, Yoshifumi Iwagami, Daisaku Yamada, Takehiro Noda, Tadafumi Asaoka, Kunihito Gotoh, Shogo Kobayashi, Yuichiro Doki, Masaki Mori, Hideshi Ishii (Osaka univertsity, School of Medicine, Department of Gastroenterological Surgery)