^○Naoto Yamamoto¹, Masaaki Murakawa², Hirohide Inoue¹, Hirokazu Yotsumoto¹, Mariko Kamiya¹, Toru Aoyama², Tsutomu Sato², Takashi Oshima², Norio Yukawa², Yasushi Rino², Munetaka Masuda², Soichiro Morinaga¹ (1.Department of Gastrointestinal Surgery, Kanagawa Cancer Center, 2.Department of Surgery, Yokohama City University)

^○Tomoyuki Yano¹, Hiroshi Kawase¹, Aya Matsui¹, Keisuke Okamura², Satoshi Hirano² (1.Department of Surgery, Sapporo Kiyota Hospital, Sapporo, Japan, 2.Department of Gastroenterological Surgery II, Graduate school of Medicine, Hokkaido University, Sapporo, Japan)

^○Kenji Sakai, Tomofumi Ohashi, Yuhi Shimura, Ryugo Tranishi, Nobutaka Hatanaka, Yoshio Yamasaki (Department of Surgery, Japan Community Health care Organization Osaka Hospital, Osaka)

^○Manami Kato, Toshiyuki Natsume, Takashi Maruyama, Osamu Kainuma (Funabashi Municipal Medical center,Chiba, Japan)

^○Shinichi Nakanuma, Hidehiro Tajima, Mitsuyoshi Okazaki, Takahisa Yamaguchi, Yoshinao Ohbatake, Isamu Makino, Hironori Hayashi, Tomoharu Miyashita, Hiroyuki Takamura, Tetsuo Ohta (Department of Gastroenterlogic Surgery, Kanazawa University)

^○Moriaki Tomikawa, Shoichi Hishinuma, Hirofumi Shirakawa, Sojun Hoshimoto, Iwao Ozawa, Yoshiro Ogata (Department of HBP Surgery, Tochigi Cancer Center, Utsunomiya, Japan)