^○Katsunori Imai, Yo-ichi Yamashita, Yuji Miyamoto, Yosuke Nakao, Toshihiko Yusa, Rumi Itoyama, Shigeki Nakagawa, Yukiharu Hiyoshi, Hirohisa Okabe, Yuki Kitano, Hidetosi Nitta, Akira Chikamoto, Hideo Baba (Department of Gastroenterological Surgery, Graduate School od Life Sciences, Kumamoto University)

^○Yoshiyuki Wada, Yuk Takami, Masaki Tateishi, Tomoki Ryu, Munehiro Yoshitomi, Hideki Saitsu (Department of Hepato-Biliary-Pancreatic Surgery, Clinical Research Institute, National Hospital Organization Kyushu Medical Center)

^○Nozomu Sakai, Yoshitomi Hideyuki, Furukawa Katsunori, Tsukasa Takayashiki, Satoshi Kuboki, Shigetsugu Takano, Daisuke Suzuki, Shingo Kagawa, Hiroyuki Nojima, Takashi Mishima, Masayuki Ohtsuka (Department of General Surgery, Chiba University)

^○Shin Kobayashi, Naoto Gotohda, Shinichiro Takahashi, Motokazu Sugimoto, Masaru Konishi (Department of Hepatobiliary and pancreatic Surgery, National cancer center Hospital east)

^○Satoshi Kaihara, Koji Kitanura, Kemji Uryuhara, Ryosuke Kita, Hideyuki Masui, Hiroki Hashida, Ryo Hosotani (Department of Surgery, Kobe Medicak Center General Hospital)