^○Yumiko Ota¹, Shuntaro Yoshida², Daisuke Yamaguchi², Akiko Narita¹, Takayuki Shimpou¹, Ayako Nakada¹, Atsuo Yamada¹, Hiroyuki Isayama¹, Yoshihiro Hirata¹, Kazuhiko Koike¹ (1.Gastroenterology,The University of Tokyo,Tokyo,Japan, 2.Endoscopy and Endoscopic Surgery, The University of Tokyo,Tokyo,Japan)

^○Yukino Kawakatsu, Kana Amamiya, Naonori Inoue, Yasutoshi Fujii, Yuki Ueda, Naokuni Sakiyama, Atsushi Shirakawa, Yusuke Okada, Kasumi Sanada, Azumi Suzuki, Kojiro Nakase, Koichiro Mandai, Takuji Kawamura, Hideaki Kawabata, Masatoshi Miyata, Atsuhiro Morita, Kiyohito Tanaka, Koji Uno, Kenjiro Yasuda (Dept. of Gastroenterology, Kyoto Second Red Cross Hospital, Kyoto, Japan)

^○Kazuhiro Tada, Tatsuichi An, Noriyuki Hoki, Hiroaki Hashimoto, Satoru Hirose, Shinya Sato, Seiichiro Mitani (Dept.Gastroenterology, Bell Land General Hospital, Sakai, Japan)

^○Yuko Miura, Akihiro Miyakawa, Kenji Shimura, Keisuke Namatsu, Kentarou Ide, Daisuke Ooki, Naoki Atuta, Ayumi Takashina, Tomoko katagiri, takao Nishikawa, Taro Shimada, Manabu Kubota, Akira Nakamura, Ei Itobayashi, Haruhisa Shimura (Asahigeneralhospital, Dept.Of Gastroenterology,Chiba,Japan)

^○Kazunori Eto, Kouji Hirata, Tomoe Kobayashi, Kouhei Konishi, Humiyasu Yamamoto (Tomakomai City Hospital, Hokkaido, Japan)