^○Yoshiaki Ibuchi¹, Shingo Yamashita², Shunichi Ariizumi², Akiko Oomori², Takaaki Kato², Satoshi Nemoto², Hiroto Egawa², Masakazu Yamamoto² (1.Tokyo Women's Medical University the medical training center for graduates, 2.Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University)

^○Daisuke Morioka, Yoshiki Sato, Nobutoshi Horii, Hideki Takakura, Masaru Miura, Norio Ohyama, Shinji Togo (Department of Surgery, Yokohama Ekisaikai Hospital, Yokohama, Japan)

^○Tatsunori Miyata¹, Yo-ichi Ymashita^1,2, Tomoharu Yosizumi², Masayuki Ota², Susumu Eguchi², Masayuki Shiraishi², Shinichi Aishima³, Hideo Baba¹, Hikaru Fujioka² (1.Department of Gastrointestinal Surgery, Kumamto University, Tokyo, Japan, 2.Kyushu Liver Surgery Study Group, Japan, 3.Department of Diagnostic Pathology, Saga University)

^○Hirokazu Yotsumoto¹, Naoto Yamamoto¹, Mariko Kamiya¹, Hirohide Inoue¹, Masaaki Murakawa², Toru Aoyama², Takashi Ohshima², Norio Yukawa², Yasushi Rino², Munetaka Masuda², Soichiro Morinaga¹ (1.The Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan, 2.The Department of Surgery, Yokohama City University Hospital, Yokohama, Japan)

^○Yoriko Nomura¹, Toru Hisaka¹, Jun Akiba², Hisamune Sakai¹, Koji Okuda¹ (1.Department of Surgery, Kurume University School of Medicine, 2.Department of Diagnostic Pathology, Kurume University Hospital)

^○Hiroyuki Takamura, Ryousuke Gabata, Mitsuyoshi Okazaki, Yoshinao Oobatake, Shinichi Nakanuma, Takahisa Yamaguchi, Isamu Makino, Hironori Hayashi, Tomoharu Miyashita, Hidehiro Tajima, Itasu Ninomiya, Sachio Fushida, Tetsuo Ohta (Gastroenterologic Surgery, Kanazawa University, Kanazawa, Japan)