^○Shoko Suzuki, Masayuki Kurosaki, Namiki Izumi, Mayu Higuchi, Hitomi Takada, Natsuko Nakakuki, Shuya Matsuda, Koichi Gondo, Yu Asano, Nobuharu Tamaki, Yutaka Yasui, takanori hosokawa, Hiroyuki Nakanishi, Kaoru Tsuchiya, Jun Itakura, Yuka Takahashi (Dept. of Gastroenterology, Japan)

^○Toshihiro Nakano¹, Wataru Ono^1,2, Hiroshi Yoshinaga¹, Shun Abe², Kou Matsuura², Tomoatsu Yoshihara², Akihiro Nakamura², Shinichi Baba², Tasuke Tanaka², Shinsuke Hiramatsu², Eiji Tsubouchi², Hiroshi Takihara², Chie Ueda², Taro Inoue² (1.Dept. of Gastroenterology,Suita Tokusyuukai Hospital,Osaka,Japan, 2.Department of Gastroenterology,Kishiwada Tokusyuukai Hospital,Osaka,Japan)

^○Koichi Izumikawa, Masaya Ishida, Tomo Kagawa, Sakiko Kuraoka, Ichiro Sakakihara, Kumiko Yamamoto, Sakuma Takahashi, Shigetomi Tanaka, Mihoko Matsuura, Shigenao Ishikawa, Masaki Wato, Toshimi Hasui, Tomoki Inaba (Dept. of Gastroenterolory,Kagawa Prefectural Central Hospital,Kagawa,Japan)

^○Nobue Ueki, Teppei Akimoto, Yuta Maruki, Hiroshi Yamawaki, Yasuhiro Kodaka, Hiroyuki Nagoya, Tomotaka Shindo, Masanori Kusunoki, Tetsuro Kawagoe, Seiji Futagami, Kazumasa Miyake, Choitsu Sakamoto (Dept. of Gastroenterology, Nippon Medical School, Tokyo, Japan)

^○Yoshiyasu Kono¹, Hiroyuki Okada², Tatsuhiro Gotoda¹, Ko Miura¹, Hiromitsu Kanzaki¹, Keisuke Hori¹, Masahide Kita¹, Seiji Kawano², Yoshiro Kawahara² (1.Dept. of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,, Dentistry and Pharmaceutical Sciences, Okayama, Japan, 2.Department of Endoscopy, Okayama University Hospital, Okayama, Japan.)