^○Ning Pu (Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China)

^○Nobuyuki Watanabe, Teiichi Sugiura, Yukiyasu Okamura, Takaaki Ito, Yusuke Yamamoto, Ryo Ashida, Katsuhisa Ohgi, Mihoko Yamada, Takuya Minagawa (Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center)

^○Toru Miyazaki, Hiroji Shinkawa, Shigekazu Takemura, Shogo Tanaka, Tokuji Ito, Takanori Aota, Masaki Koda, Shoji Kubo (Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan)

^○Kento Kurashima, Hisashi Ikoma, Tomohiro Arita, Toshiyuki Kosuga, Ryo Morimura, Yasutoshi Murayama, Atsushi Shiozaki, Yoshiaki Kuriu, Eigo Otsuji (Department of Surgery, Division of Digestive Surgery, Kyoto Prefecture University of Kyoto, Kyoto, Japan)

^○Ken Ichikawa, Shugo Mizuno, Aoi Hayasaki, Masashi Kishiwada, Yusuke Iizawa, Takehiro Fujii, Hiroyuki Kato, Akihiro Tanemura, Yasuhiro Murata, Naohisa Kuriyama, Yoshinori Azumi, Masanobu Usui, Hiroyuki Sakurai, Shuji Isaji (Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University Graduate School of Medicine)

^○Kazuya Takabatake, Hisashi Ikoma, Taisuke Imamura, Ryo Morimura, Hisataka Matsuo, Tomohiro Arita, Toshiyuki Kosuga, Yasutoshi Murayama, Atsushi Shiozaki, Yoshiaki Kuriu, Eigo Otsuji (Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan)