^○Fabio Procopio, L. Viganò, M. Cimino, M. Donadon, D. Del Fabbro, G. Torzilli (Division of Hepatobiliary & General Surgery, Department of Surgery, Humanitas Research Hospital, Humanitas University, Milan, Italy)

^○Jeong-Moo Lee, Kyung-Suk Suh, Suk Kyun Hong, Kyung Chul Yoon, Jae-Hyung Cho, Nam-Joon Yi, Kwang-Woong Lee (Department of Surgery, Seoul National University Hospital, Seoul, Korea)

^○Yuichiro Okumura, Takehiro Noda, Hidetoshi Eguchi, Yoshifumi Iwagami, Daisaku Yamada, Tadafumi Asaoka, Koichi Kawamoto, Kunihito Gotoh, Syogo Kobayashi, Yuichiro Doki, Masaki Mori (Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University)

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

^○Shinya Hayami, Masaki Ueno, Manabu Kawai, Seiko Hirono, Ken-ichi Okada, Motoki Miyazawa, Yuji Kitahata, Norihiko Suzaki, Ryohei Kobayashi, Hiroki Yamaue (Second Department of Surgery, Wakayama Medical University, Wakayama, Japan)

^○Tomoki Ryu^1,2, Yuko Takami¹, Yoshiyuki Wada¹, Masaki Tateishi¹, Takayuki Hara¹, Munehiro Yoshitomi^1,2, Hideki Saitsu¹, Koji Okuda² (1.Department of Hepato-Biliary-Pancreatic Surgery, Kyushu Medical Center, Fukuoka, Japan, 2.Department of Surgery, Kurume University School of Medicine, Kurume, Fukuoka, Japan)