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

^○Masahiro Hagiwara, Kouji Imai, Mikako Gochi, Hiroyuki Takahashi, Toshiyasu Kawahara, Naoto Matsuno, Hiroyuki Furukawa (Department of Surgery, Asahikawa Medical University, Hokkaido, Japan)

^○Kengo Asami, Satoru Yoshida, Yoshihito Nakayama (Department of Surgery, Hachinohe City Hospital, Aomori, Japan)

^○Masafumi Akasu¹, Atsushi Kudo¹, Tomotaka Kato¹, Jun Yoshino¹, Shuichi Watanabe¹, Norimichi Chiyonobu¹, Yuki Mizuno¹, Keichi Akahoshi¹, Toshiro Ogura¹, Kosuke Ogawa¹, Hiroaki Ono¹, Yusuke Mitsunori¹, Daisuke Ban¹, Shinji Tanaka², Minoru Tanabe¹ (1.Department of Hepato-Biliary-Pancreatic Surgery,Tokyo Medical and Dental University, Tokyo, Japan, 2.Department of Molecular Oncology,Tokyo Medical and Dental University, Tokyo, Japan)

^○Ryo Okada, Takashi Kimura, Seiko Suzushino, Makoto Muto, Junichiro Watanabe, Naoya Sato, Yasuhide Kofunato, Teruhide Ishigame, Akira Kenjo, Tatsuo Shimura, Shigeru Marubashi (Department of Hepato-Biliary-Pancreatic and Transplant Surgery, Fukushima Medical University)

^○Makoto Takeda, Takanori Sakaguchi, Ryou Kitajima, Satoru Furuhashi, Ryouta Kiuchi, Takanori Hiraide, Yasushi Shibasaki, Yoshifumi Morita, Hirotoshi Kikuchi, Hiroya Takeuchi (Second Department of Surgery, Hamamatsu University School of Medicine)