^○Yuichi Hayashi, Yoichi Matsuo, Goro Ueda, Hiroyuki Imafuji, Kenta Saito, Tomoya Shamoto, Ken Tsuboi, Mamoru Morimoto, Hiroki Takahashi, Hideyuki Ishiguro, Shuji Takiguchi (Department of Gastroenterological Surgery, Nagoya City University, Nagoya, Japan)

^○Takashi Miyamoto, Yukiyasu Okamura, Teiichi Sugiura, Takaaki Ito, Yusuke Yamamoto, Ryo Ashida, Katsuhisa Ohgi, Takuya Minagawa, Syunsuke Tamura, Katsuhiko Uesaka (Department of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center, Shizuoka, Japan)

^○Kosei Maemura¹, Yuko Mataki¹, Hiroshi Kurahara¹, Yota Kawasaki¹, Kiyonori Tanoue¹, Motoyuki Hashiguchi¹, Satoshi Iino¹, Masahiko Sakoda¹, Shinichi Ueno², Hiroyuki Shinchi³, Shoji Natsugoe¹ (1.Department of Digestive Surgery, Kagoshima University, 2.Clinical Oncology, Kagoshima University, 3.Kagoshima university Graduate school of health sciences)

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

^○Hitoshi Masuo, Hiroaki Motoyama, Akira Kobayashi, Takahide Yokoyama, Akira Shimizu, Tsuyoshi Notake, Kenta Yokoi, Kentaro Fukushima, Hiroki Sakai, Kiyotaka Hosoda, Shinichi Miyagawa (Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan)

^○Sadatoshi Shimizu, Akihiro Murata, Akishige Kanazawa, Shintaro Kodai, Katsunobu Sakurai, Kohei Nishio, Yorihisa Urata, Kotaro Miura, Masahiko Kinoshita, Genya Hamano, Tetsuzo Tashima, Sota Deguchi, Daisuke Shirai (Department of HBP Surgery, Osaka City General Hospital)