^○Hiroko Inomata, Shoichi Saito, Hisao Tajiri (The Jikei University School of Medicine Dept. of Endoscopy, Japan)

^○Kunio Asonuma, Yuichiro Kuroki, Misako Tohata, masashi Hayashi, Reika Suzuki, Syotaro Hanamura, Yuichi Takano, Eiichi Yamamura, Masatsugu Nagahama, Kazuaki Inoue, Hiroshi Takahashi (Divison of Gastroenterology, Showa University, Fuzigaoka Hospital, Kanagawa, Japan)

^○Eiko Okamoto¹, Katsunori Ami², Ayako Watanabe¹, Junnosuke Hayasaka¹, Kentaro Takagi¹, Akiko Kitazume¹, Atsushi Tamura¹, Mayumi Kondo¹, Hidetoshi Amagasa², Hideaki Ganno², Hidetaka Akita³, Shikofumi Tei³, Takeshi Nagahama², Masayuki Ando², Kuniyoshi Arai² (1.Dept. of Gastroenterology, Tokyo Metropolitan Toshima Hospital, Tokyo, Japan, 2.Dept. of Surgery, Tokyo Metropolitan Toshima hospital, Tokyo, Japan, 3.Dept. of Pathology, Tokyo Metropolitan Toshima hospital, Tokyo, Japan)

^○Toshifumi Mitani, Yasutaka Kuribayashi, Kosuke Nomura, Ryusuke Kimura, Akihiro Yamada, Tsukasa Furuhata, Satoshi Yamashita, Daisuke Kikuchi, Akira Matsui, Osamu Ogawa, Toshirou Iizuka, Shu Hoteya, mitsuru Kaise (Dept. of Gastroenterology, Toranomon Hospital, Tokyo, Japan)

^○Takao Horiuchi¹, Yohei Furumoto², Mana Matsuoka², Masami Ike², Yasuhiro Iizuka², Shunsuke Ueyama², Yuzo Toyama², Shinya Mano², Katsumasa Kobayashi², Keiichi Nasu³, Kentarou Inada³, Nahoko Sazaki², Shinji Suzuki⁴, Toru Asano², Tsuyosi Maeshiro³, Yoshimichi Chuganji², Kazuhiko Fujiki² (1.Dept. of Endoscopy, Tokyo Metropolitan Bokutoh Hospital., Tokyo, Japan, 2.Dept. of Internal Medicine, Tokyo Metropolitan Bokutoh Hospital., Tokyo, Japan, 3.Dept. of Surgery, Tokyo Metropolitan Bokutoh Hospital., Tokyo, Japan, 4.Dept. of Surgery Gastroenterology Center, International University of Health and Welfare, Mita Hospital. Tokyo, Japan)