^○Yo-ichi Yamashita, Tatsunori Miyata, Kota Arima, Hirohisa Okabe, Hidetoshi Nitta, Yuki Kitanao, Yosuke Nakao, Toshihiko Yusa, Rumi Itohyama, Shigeki Nakagawa, Katsunori Imai, Akira Chikamoto, Hideo Baba (Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University)

^○Keiko Kamei, Ippei Matsumoto, Kohei Kawaguchi, Yuta Yoshida, Masataka Matsumoto, Takaaki Murase, Shumpei Satoi, Takuya Nakai, Yoshifumi Takeyama (Department of Surgery, Kindai University Faculty of Medicine)

^○Shoji Kanno, Hiroyuki Nitta, Hirokatsu Katagiri, Yasushi Hasegawa, Takeshi Takahara, Akira Sasaki (Department of Surgery, Iwate Medical University, Iwate, Japan)

^○Yukiyasu Okamura, Teiichi Sugiura, Takaaki Ito, Yusuke Yamamoto, Ryo Ashida, Katsuhisa Ohgi, Mihoko Yamada, Nobuyuki Watanabe, Syusei Sano, Katsuhiko Uesaka (Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center Hospital)

^○Yoichiro Uchida, Hiroaki Terajima, Akimori Miki, Ryo Ohno, Kentaro Kadono, Tomohiro Okamoto, Ryo Kamimura, Masashi Horiguchi (Department of Gastroenterological Surgery and Oncology, The Tazuke Kofukai Medical Research Institute, Kitano Hospital)

^○Toru Hisaka, Hiroto Ishikawa, Ryuichi Kawahara, Hisamune Sakai, Yuichi Goto, Toshihiro Sato, Yoriko Nomura, Yusuke Hirakawa, Hiroki Ureshino, Kazuhiro Mikagi, Masafumi Yasunaga, Hiroyuki Tanaka, Yoshito Akagi, Koji Okuda (Department of Surgery, Kurume University, Kurume, Japan)