^○Daisuke Komichi¹, Yukio Kuwada¹, Maiko Hanada², yuno omura¹, Ayami Fukiage², Kana Tojo², ichiro otani¹, Tomoki Hiramoto², Yuko Hiraga², Chiyuki Watanabe², Mikiya Kitamoto¹, Hiroyasu Yamada¹, Masaaki Sumioka² (1.Dept. of Gastroenterology, Hiroshima Prefectural Hospital, Hiroshima, Japan, 2.Department of Endoscopy, Hiroshima Prefectural Hospital, Hiroshima, Japan)

^○Akira Yamamiya, Katsuya Kitamura, Yu Ishii, Tomohiro Nomoto, Tadashi Honma, Hitoshi Yoshida (Div. of Gastroenterology, Dept. of Medicine, Showa Univ. Sch. of Med., Tokyo, Japan)

^○Takahiro Inoue¹, Shunya Iseki¹, Kensuke Hamada¹, Masamichi Arao¹, Eri Tokunaga¹, Yuka Sumino¹, Hiroyuki Yoshida¹, Kanna Adachi¹, Yukari Shimada¹, Motohito Hayashi¹, Toshinao Itani¹, Jun Mimura¹, Kimio Hashimoto² (1.Dept. of Gastroenterology, Nishi-Kobe Medical Center, Hyogo, Japan, 2.Dept. of Pathology, Nishi-Kobe Medical Center, Hyogo, Japan)

^○Kanetoshi Suwa, Naoyuki Matsumoto, Megumi Hayakawa, Noriko Tanaka, Hiroyuki Yoriki, Masayasu Jo, Keika Zen, Ryusuke Takada, Akira Masuzawa, Shiro Takami, Naoki Wakabayashi, Keisho Kataoka (Dept. of Gastrointestinal Medicine, Otsu Municipal Hospital, Shiga, Japan)

^○Toru Okuzono, Junichi Ishibashi, Hayato Aoki, Masato Nakahori, Akimichi Chonan (Gastrointestinal Endoscopy Center, Sendai Kosei Hospital, Miyagi, Japan)