^○Hisami Ando (Aichi Prefectural Colony)

^○Kentaro Araki, Yasuhiro Yabushita, Ryusei Matsuyama, Nobuhiro Tsuchiya, Takashi Murakami, Yu Sawada, Takafumi Kumamoto, Itaru Endo (Department of Gastroenterological Surgery, Yokohama City University, Kanagawa, Japan)

^○Soichi Furukawa, Junichi Arita, Yuta Kobayashi, Nobuhisa Akamatsu, Junichi Kaneko, Yoshihiro Sakamoto, Kiyoshi Hasegawa (Hepato-Biliary-Pancreatic Surgery Division, The University of Tokyo Hospital, Tokyo, Japan)

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

^○Tsukasa Takayashiki, Hideyuki Yoshitomi, Katsunori Furukawa, Satoshi Kuboki, Shigetsugu Takano, Daisuke Suzuki, Nozomu Sakai, Shingo Kagawa, Hiroyuki Nojima, Takashi Mishima, Masayuki Ohtsuka (Department of general Surgery, graduate school of Medicine, Chiba University)

^○Kenjiro Okada, Yoshiaki Murakami, Kenichiro Uemura, Naru Kondo, Naoya Nakagawa (Department of Surgery, Hiroshima University, Hiroshiima, Japan)

^○Hideo Ohtsuka, Tatsuo Hata, Masahiro Iseki, Tatsuyuki Takadate, Kyohei Ariake, Kunihiro Masuda, Masaharu Ishida, Koji Fukase, Masamichi Mizuma, Takanori Morikawa, Hiroki Hayashi, Kei Nakagawa, Fuyuhiko Motoi, Takeshi Naitoh, Michiaki Unno (Department of Surgery, Tohoku University, Sendai, Japan)