^○shintaro koyama, Takumi Fukuchi, takaaki eguchi, ryuki kitada, taro iwatsubo, satoshi Ubukata, Hiroshi Yamashita, Akihiko Okada (Gastroenterology and Hepatorogy, Osakafu Saiseikai Nakatu Hospital, Osaka, Japan)

^○Tomomi Segawa¹, Mana Suzuki¹, Jun Murata¹, Aiko Okada¹, Daisuke Kuriyama¹, Kazuyuki Sasaki¹, Haruki Akamatsu¹, Sadaharu Iio¹, Yuko Kawanishi¹, takanori Tsutsui¹, Ichizo Kobayashi¹, Tomo Nakagawa², Ken Konishi², Shunji Endo² (1.Higashiosaka City General Hospital Dept. of Gastroenterology,Osaka,Japan, 2.Higashiosaka City General Hospital department of gastrointestinal surgery,Osaka,Japan)

^○Naoki Konno¹, Tadayuki Takagi¹, Takuto Hikichi², Rei Suzuki¹, Ko Watanabe², Jun Nakamura¹, Mitsuru Sugimoto¹, Hitomi Kikuchi¹, Yuichi Waragai¹, Mika Takasumi¹, Katsutoshi Obara², Hiromasa Ohira¹ (1.Div. of Gastroenterology and Rheumatology, Sch. of Med. Fukushima Medical University., Fukushima, Japan, 2.Div. of Endoscopy, Fukushima Medical University Hospital., Fukushima, Japan)

^○Isao Fujita, Tatsuya Toyokawa, Katsunori Matsueda, shizuma Omote, akiko okamoto, Yuya Ueda, Yuko Jinno, Shinya Endo, Joichiro Hori, Takako Murakami (National Hospital Organization Fukuyama Medical Center, Dept. of Gastroenterology, Fukuyama, Japan)

^○Kunihiro Hosono, Sho Hasegawa, Yuji Fujita, Yusuke Sekino, Kensuke Kubota, Atsushi Nakajima (Dept. of Gastroenterology and Hepatology, Sch. of Med. Yokohama Univ., Yokohama, Japan)