^○Hisashi Kametaka, Hironobu Makino, Tadaomi Fukada, Takahiro Akiyama, Manabu Saito, Shunnsuke Tabe, Miyako Oya (Department of General Surgery, Odawara Municipal Hospital, Odawara, Japan)

^○Atsushi Takebe, Makoto Shinzeki, Kenji Fukushima, Kenichi Tanaka (Department of Surgery, Osakafu Saiseikai Nakatsu Hospita, Osaka, Japan)

^○Koji Kitamura, Satoshi Kaihara, Ryosuke Kita, Hideyuki Masui, Hiroki Hashida, Kenji Uryuhara, Ryo Hosotani (Department of Surgery, Kobe City Medical Center General Hospital)

^○Feng-Hsu Wu (General Surgery Taichung Veterans General Hospital)

^○Yuhei Hamaguchi, Toshimi Kaido, Shinya Okumura, Atsushi Kobayashi, Hisaya Shirai, Siyuan Yao, Shintaro Yagi, Naoko Kamo, Satoru Seo, Kojiro Taura, Hideaki Okajima, Shinji Uemoto (Division of Hepato-Biliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan)

^○Takahiro Murakami (Department of Surgery, Okinawa Chubu Hospital)