^○Eiji Kubota, Hiromi Kataoka, Takashi Joh (Dept.Of Gastroenterology and Metabolism, Nagoya City Univ., Nagoya, Japan)

^○Norihisa Ishimura, Masahito Aimi, Yoshikazu Kinoshita (Dept. of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan)

^○Kento Takenaka, yu matsuzawa, Mamoru Watanabe (Dept. of Gastroenterology and Hepatology, Tokyo Medical and Dental Univ., Tokyo, Japan)

^○Kumiko Tanaka, Tetsuo Kimura, Tetsuji Takayama (Dept. of Gastroenterology and Oncology, Tokushima University Hospital, Tokushima, Japan)

^○Hiroshi Fujita¹, Mitsuo Nagasaka², Ichiro Hirata² (1.Dept. of Gastroenterology, Nissin Orido Hospital, Aichi, Japan., 2.Dept. of Gastroenterology, Sch. of Med. Fujita Health University, Aichi, Japan)

^○Jun Arimoto¹, Hiroki Endo², Atsushi Nakajima² (1.Hiratuka City Hospital, Kanagawa, Japan, 2.Div, of gastroenterology and hepatology, Yokohama City Univ, Yokohama, Japan)

^○Shunichi Yanai¹, Tamotsu Sugai², Takayuki Matsumoto¹ (1.Div. of Gastroenterology, Dept. of Internal Medicine, Iwate Medical University, Morioka, Japan, 2.Department of Diagnostic Pathology, Iwate Medical University, Iwate, Japan)

^○Kazuki Kakimoto, Takuya Inoue, Kazuhide Higuchi (Second Dept. of Internal Medicine, Osaka Medical College, Osaka, Japan)

^○Yasuaki Ueno¹, Masanao Nakamura¹, 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)

^○Tadakazu Hisamatsu¹, Naoki Hosoe², Takanori Kanai¹ (1.Div. of Gastroenterology and Hepatology, Dept. of Internal Medicine, Keio University School of Medicine, Tokyo, Japan, 2.Center for Diagnostic and Therapeutic Endoscopy, Keio University School of Medicine, Tokyo, Japan)

^○Kosuke Nomura, Toshiro Iizuka, mitsuru Kaise (Dept. of Gastroenterology, Toranomon Hospital, Tokyo, Japan)

^○Tsuyoshi Ogashiwa, Reiko Kunisaki, Hideaki Kimura (Inflammatory Bowel Disease Center, Yokohama City University Medical Center, Yokohama, Japan)