^○Shigeaki Sawada¹, Isaku Yoshioka², Kazuto Shibuya², Shinichi Sekine², Tomoyuki Okumura², Tsutomu Fujii² (1.Department of Surgery, Itoigawa General Hospital, Niigata Federation of Agricultural Cooperative Associations, Niigata, Japan, 2.Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan)

^○Hideaki Sueoka, Kazuhiro Suzumura, Toshihiro Okada, Naoki Uyama, Ikuo Nakamura, Masaharu Tada, Seikan Hai, Kenjiro Iida, Hideaki Iwama, Hiroshi Nishida, Shinjiro Tamagawa, Etsuro Hatano, Jiro Fujimoto (Department of Surgery, Hepato-Biliary-Pancreas Surgery, Hyogo College of Medicine)

^○Shoichi Irie, Yu Takahashi, Takeaki Ishizawa, Yoshihiro Mise, Yosuke Inoue, Hironori Ito, Akio Saiura (Japanese Foundation for Cancer Research)

^○Seikan Hai, Etsuro Hatano, Toshihiro Okada, Yasukane Asano, Naoki Uyama, Kazuhiro Suzumura, Masaharu Tada, Ikuo Nakamura, Kenjiro Iida, Hideaki Sueoka, Hideaki Iwama, Hiroshi Nishida, Shinjiro Tamagawa, Jiro Fujimoto (Department of Surgery, Hyogo College of Medicine)

^○Shigeto Ochiai, Koichi Tomita, Kei Yokozuka, Takahiro Gunji, Masaaki Okihara, Toru Sano, Rina Tsutsui, Naokazu Chiba, Shigeyuki Kawachi (Department of Digestive and Transplantation Surgery, Tokyo, Japan)