^○Takeshi Okamoto¹, Jun Nishikawa¹, Misato Nagao¹, Junichi Nishimura¹, Munetaka Nakamura¹, Atsushi Goto², Koichi Hamabe³, Isao Sakaida¹ (1.Dept. of Gastroenterology and Hepatology, Yamaguchi Univ. Grad. Sch. of Med., Ube, Japan, 2.Hagi Civil Hospital, Hagi, Japan, 3.Ube-kohsan Central Hospital, Ube, Japan)

^○Shuhei Ishiyama, Junji Shiode, Masao Yoshioka, Akiko Fujiwara, Junichiro Nasu, mamoru ito, masakuni fujii, Shunsuke Saito, Mitsuhiro Kaneto, Yuki Ishihara, yuki okamoto, soichiro kawahara (Dept. of Gastrointestinal Medicine,Okayama Saiseikai General Hospital,Okayama,Japan)

^○Shun Abe¹, Taro Inoue¹, Hiroshi Takihara¹, Akihiro Nakamura¹, Eiji Tsubouchi¹, Shinichi Baba¹, Shinsuke Hiramatsu¹, Tomoatsu Yoshihara¹, Tasuke Tanaka¹, Kou Matsuura¹, Takashi Toyonaga², Wataru Ono¹, Chie Ueda¹, Toshihiro Nakano¹ (1.Dept. of Gastroenterology Kishiwadatokushukai Hospital, Osaka, Japan, 2.Koubedaigaku)

^○Ryoji Fujii, Tetsuya Sumiyoshi, Takeyoshi Minagawa, Shinya Fujie, Tomohiro Kimura, Hideyuki Ihara, Naohito Yoshizaki, Michiaki Hirayama, Hitoshi Kondo (Dept. of Gastroenterology, Tonan Hospital, Sapporo, Japan)

^○Akihiro Takahashi, Hideyuki Chiba, Daisuke Kurihara, Takuma Suto, Keiichi Ashikari, Naoya Kawano, Shihoko Seki, Shinshuke Tsuruta, Tomonori Ida, Taiki Morohashi, Toru Goto (Omori Red Cross Hospital,Tokyo,Japan)