^○Shingo Kato, Kazuhito Kani, Koji Yakabi (Dept. of Gastroenterologu and Hepatology, Saitama Medical Center, Saitama Medical Univ., Saitama, Japan)

^○Motoyuki Onodera¹, Katsuya Endo¹, Masatake Kuroha¹, tomoya kimura¹, hisashi shiga¹, Yoichi Kakuta¹, Yoshitaka Kinouchi², Toru Shimosegawa¹ (1.Dept. of Gastroenterology, Tohoku University, Japan, 2.Student Health Care Center, Tohoku University)

^○Katsuya Endo, Toshihiro Tadano, Toru Shimosegawa (Div. of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan)

^○Kana Kawagishi¹, Kaoru Yokoyama¹, Aya Kato³, shohei ooka¹, Miwa Sada¹, Kiyonori Kobayashi², Wasaburo Koizumi¹ (1.Dept. of Gastroenterology, Kitasato University Hospital, Kanagawa, Japan, 2.Research and Development Center for New Medical Frontiers, Kitasato University, School of Medicine, Kanagawa, Japan, 3.Health care center, Sagamino Hospital, Kanagawa, Japan)

^○Joji Tani, Hideki Kobara, Hirohito Mori, Tsutomu Masaki (Dept. of Gastroenterology and Neurology, Kagawa University Faculty of Medicine, Kagawa, Japan)

^○Masanobu Matsushita¹, Osamu Watanabe¹, Kazuhiro Ishiguro¹, Masanao Nakamura¹, Takeshi Yamamura¹, Kazuhiro Morise¹, Keiko Maeda¹, Yoshiki Hirooka², Takafumi Ando¹, Hidemi Goto¹ (1.Dept. of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Japan, 2.Department of Endoscopy, Nagoya University Graduate School of Medicine)

^○Shingo Kato, Taisuke Kobayashi, Kazuhito Kani, Yuji Terai, Ryoji Arai, Tetsuro Fujita, Takeshi Otsuka, Eriko Hosomi, Masatomo Takahashi, Kenjiro Hayashi, Katsuya Chinen, Yasuyo Osafune, Toru Aoyama, Naoya Miyagi, Ryuichi Yamamoto, Shino Oono, Sumiko Nagoshi, Koji Yakabi (Dept. of Gastroenterology and Hepatology, Saitama Medical Center, Saitama Medical Univ. Saitama, Japan)