^○Itaru Yamamoto, Tokuma Tanuma, Yushi Kimura, Hideaki Koga, Taku Harada, Shinji Urade, Masafumi Nomura, Hiroyuki Maguchi (Teine Keijinkai Hospital, Sapporo, Japan)

^○Atsushi Michigami, Hajime Suzuki, Satoshi Maeda, Akihiro Ito, Tsuyotaka Kashu, Shizuki Yanagihara, Yuhei Otoguro, Yohei Terakado, Hitoshi Nishioka, Takeshi Hagiwara, Yoshiyuki Watanabe, Hiroshi Kozawa, Sei Kurokawa, Akimichi Imamura (Dept. of Gastroenterology,Sapporo Kosei General Hospital,Sapporo,Japan)

^○Hiromitsu Asai¹, Ryoji Miyahara¹, Kohei Funasaka², Kazuhiro Furukawa¹, Ippei Matsuzaki¹, Takafumi Yokoyama¹, Masakazu Kikuchi¹, Tomohiko Obayashi¹, Kenichi Kobayashi¹, Takeshi Yamamura², Eizaburo Ohno¹, Masanao Nakamura¹, Hiroki Kawashima¹, Yoshiki Hirooka², Osamu Watanabe¹, Takafumi Ando¹, Hidemi Goto^1,2 (1.Dept. of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan., 2.Department of Endoscopy, Nagoya University Hospital, Nagoya, Japan)

^○Tatsuhiro Gotoda¹, Yoshiro Kawahara², Hiroyuki Okada², Yoshiyasu Kono¹, Ko Miura¹, Hiromitsu Kanzaki¹, Keisuke Hori³, Masahide Kita¹, Seiji Kawano² (1.Dept. of Gastroenterology and Hepatology, Okayama Univ, Okayama, Japan, 2.Division of Endoscopy, Okayama University Hospital, Japan, 3.Center for innovative clinical medicine, Okayama University Hospital, Japan)

^○Ryuta Takenaka, Chihiro Ando, Shotaro Okanoue, Tomoko Sunami, Shohei Oka, Yuki Baba, Hisashi Ishikawa, Daisuke Kawai, Koji Takemoto, Hirofumi Tsugeno, Shigeatsu Fujiki (Dept. of Gastroenterology, Tsuyama Chuo Hospital, Tsuyama, Japan)