^○Hwui-Dong Cho (Division of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery Ulsan University and Asan Medical Center)

^○Katsuyoshi Furumoto, Masahiko Yamaguchi (Department of Surgery, Koseikai Takeda Hospital)

^○Masahiko Fukase, Hideaki Kodama, Tomomi Kawana, Yusuke Saito, Hiroyuki Yashima, Emiko Kono, Yukiko Oshima, Gen Yunome, Ayako Endo, Hiroshi Oshio, Hiromune Shimamura, Shin Teshima, Toshihiro Saito (Department of Surgery, Sendai Medical Center, Sendai, Japan)

^○Daisuke Tsugawa, Masahiro Kido, Motofumi Tanaka, Hisoka Kinoshita, Shohei Komatsu, Masahide Awazu, Hidetoshi Gon, Kentaro Tai, Keisuke Arai, Yuki Yasuhara, Yoshihide Nanno, Sachiyo Shirakawa, Hironori Yamashita, Hideyo Mukubo, Sachio Terai, Hirochika Toyama, Kimihiko Ueno, Tetsuo Ajiki, Takumi Fukumoto (Department of Surgery, Division of Hepato-Biliary-Pancreatic Surgery, Kobe University Graduate School of Medicine, Japan)

^○Masahiko Kubo, Kunihito Gotoh, Hidetoshi Eguchi, Yoshifumi Iwagami, Daisaku Yamada, Takehiro Noda, Tadafumi Asaoka, Shogo Kobayashi, Yuichiro Doki, Masaki Mori (Department of Gastroenterological Surgery, Osaka University, Osaka, Japan)

^○Takahiro Kyuno, Hironori Hayashi, Hiroyuki Takamura, Yoshinao Ohbatake, Shiniti Nakanuma, Mitsuyoshi Okazaki, Takahisa Yamaguchi, Shirou Terai, Kouichi Okamoto, Seishou Sakai, Jun Kinoshita, Isamu Makino, Keishi Nakamura, Katsunobu Oyama, Tomoharu Miyashita, Hidehiro Tajima, Itasu Ninomiya, Sachio Fusida, Tetsuo Ohta (Department of Gastroenterological Surgery, Kanazawa University)