^○Masashi Yabiki, Ryosaku Azemoto, Yu Yoshida, tatsuya Fujimoto (Dept. of Gastroenterology,Kimitsu Chuo Hospital,Chiba,Japan)

^○Tetsuo Tamura, Tsunao Imamura, Yuko Koizumi, Rikako Koyama, Kazuo Takeuchi (Dept. of Gastroenterology, Toranomon Hospital, Tokyo, Japan)

^○Masayoshi Sawai¹, Akira Mitoro², Motoyuki Yoshida², Akitoshi Douhara², Erika Shioyama², Shinya Takeyama², Kou Kitagawa², Masatoshi Furukawa², Kenichiro Seki², Koji Ishida², Hitoshi Yoshiji², junichi Yamao¹, Hiroshi Fukui² (1.Dept. of Central Endoscopy and Ultrasound,Nara Medical University,Nara,Japan, 2.Department of Gastroenterology and Endocrinology and Metabolism, Nara Medical University,Nara,Japan)

^○Mari Yamagami, Nobuo Toda, Satoshi Kawamura, Yuki Karasawa, Yuki Hayata, Daisaku Ito, Tomoharu Yamada, Koki Kawanishi, Koki Sato, Kentaro Kojima, Takamasa Oki, Michiharu Seki, Toshihiko Arizumi, Kazumi Tagawa (Dept. of Gastroenterology, Mitsui Memorial Hospital, Tokyo, Japan)

^○Masayoshi Kobayashi, Nobuto Hirata, So Nakaji, Yuya Yokoyama, Hiroki Yamamoto, Masahiro Sanagawa, Keisuke Kanda, Shigenobu Yoshimura, Kenji Yamauchi, Tatsuo Morinushi, Naoki Okumura, Kenichi Suzuki, Toshiyasu Shiratori, Mitsuru Hirai (Dept. of Gastroenterology, Kameda Medical Center, Chiba, Japan)