^○Atsuko Soeda, Daisuke Ochi, Hiroaki Sugiyama, Mariko Kobayashi, Ayumu Motohashi, Sayoko Shidara, Kazuto Ikezawa, Akira Nakahara (Dept. of Gastroenterology, Tsukuba Memorial Hospital, Tsukuba, Japan)

^○Erika Shioyama, Shigehiko Ueda, Masaaki Yoshikawa, Kou Kitagawa, Takahiro Odutsumi, Takuya Kubo, Hiroyuki Ogawa (Kokuhotyuou Hospital, Nara, Japan)

^○Gota Sudo, Daisuke Hirayama, Keiko Ushijima, Ryo Suzuki, Toshikuni Oka, Kaoru Kasahara, Toshihisa Kobayashi, Atsushi Yawata (Dept. of Gastroenterology and Hepatology, Hakodate Goryokaku Hospital, Japan)

^○Masatoshi Kaida¹, Akane Fujita², Miwa Kawamitsu¹, Teruhisa Tanaka², Shigehito Tameda¹, Kouhei Shimoji¹, Jirou Tamura¹, Ryo Takagi¹, Shingo Arakaki², Miwa Higashiarakawa², Daisuke Shibata², Tetsu Kinjyou¹, Tatsuji Maeshiro², Kazuto Kishimoto², Nagisa Kinjyou¹, Tetsuo Hirata², Akira Hokama², Jirou Fujita² (1.Dept. of Endoscopy, Faculty of Medicine, University of Ryukyus., Okinawa, Japan, 2.First Department of Internal Medicine, University of Ryukyus., Okinawa, Japan)

^○Kei Ishizuka, takashi murakami, hiroya ueyama, kenshi matsumoto, Tomoyoshi Shibuya, naoto sakamoto, Taro Osada, akihito nagahara, sumio watanabe (Juntendo Nniversity,Gastroenterology,Tokyo,Japan)