^○Shintaro Kodai, Akishige Kanazawa, Akihiro Murata, Sadatoshi Shimizu, Ken Yonemitsu, Takuya Kikuchi, Daisuke Shirai, Yurika Iida, Syuhei Kushiyama, Sota Deguchi, Tetsuzo Tashima, Genya Hamano, Masahiko Kinoshita, Kotaro Miura, Yorihisa Urata, Yukio Nishiguchi (Department of Hepato-Biliary-Pancreatic Surgery, Osaka city general Hospital, Osaka, Japan)

^○Masaki Kimura, Katsutoshi Murase, Shinichiro Arakawa, Seishiro Sekino, Shigeru Kiyama (Department General and Cardiothoracic Surgery, Graduate School of Medicine, Gifu University)

^○Hideki Yokoo, Toshiya Kamiyama, Tatsuya Orimo, Kenji Wakayama, Shingo Shimada, Akihisa Nagatsu, Hirofumi Kamachi, Akinobu Taketomi (Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan)

^○Ryoga Hamura, Koichiro Haruki, Ryouta Iwase, Yuichi Ishida, Masashi Tsunematsu, Rui Marukuchi, Hironori Shiozaki, Shinji Onda, Taigo Hata, Takeshi Gocho, Hiroaki Shiba, Katsuhiko Yanaga (Department of Surgery, The Jikei University School of Medicine, Tokyo Japan)

^○Yasuji Hashimoto, Yo Sasaki, Masaru Kubota (Department of Surgery, Yao Municipal Hospital)

^○Akira Yasuda, Yutaro Kato, Yoshinao Tanahashi, Satoshi Mii, Gozo Kiguchi, Tadashi Kagawa, Masayuki Kojima, Sanae Nakajima, Shoichiro Tsuji, Atsushi Sugioka, Ichiro Uyama (Department of Gastroenterological Surgery, Fujita Health University, Aichi, Japan)