^○Hiroaki Terajima, Yoichiro Uchida, Kentaro Kadono, Ryo Ohno, Akimori Miki, Tomohiro Okamoto, Ryo Kamimura (Dept. of Gastroenterological Surgery and Oncology, Kitano Hospital, Osaka, Japan)

^○Akira Maki, Ryota Kogure, Akiko Nakazawa, Tetsuya Mitsui, Youichi Miyata, Riki Ninomiya, Masahiko Komagome, Yoshifumi Beck (Hepato-Pancreato-Biliary Surgery, Saitama Medical University Medical center)

^○Nobuyuki Takemura, Atsuko Kataoka, Fuyuki Inagaki, Fuminori Mihara, Toshiaki Kurokawa, Makoto Tokuhara, Norihiro Kokudo (Department of Surgery, Hepato-biliary-pancreatic surgical Division)

^○Hye-Sung Jo (Division of HBP Surgery and Liver Transplantation, Department of Surgery Korea University College of Medicine)

^○Shunichi Imai, Osamu Itano, Shoichi Fujii, Masahiro Yoshida (Department of Hepato-Biliary-Pancreatic and Gastrointestinal Surgery, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan)

^○Yusuke Kawamoto, Takahisa Fujikawa, Norio Emoto, Akira Tanaka (Department of Surgery, Kokura Memorial Hospital, Fukuoka, Japan)