^○Minami Hashimoto¹, Takuto Hikichi², Jun Nakamura¹, Ko Watanabe², Hitomi Kikuchi¹, Yuichi Waragai¹, Tadayuki Takagi¹, Rei Suzuki¹, Mitsuru Sugimoto¹, Naoki Konno¹, Mika Takasumi¹, Katsutoshi Obara², Hiromasa Ohira¹ (1.Dept. of Gastroenterology and Rheumatology,Fukushima Medical University School of Medicine,Fukushima,Japan, 2.Department of Endoscopy,Fukushima Medical University Hospital,Fukushima,Japan)

^○Tetsuya Iwasaki, Takuya Yamada, Kentaro Nakagawa, Yuichiro Matsumura, Keisuke Fukutomi, Keiichi Kimura, Aya Sugimoto, Kenji Hibino, Ryuichiro Iwasaki, Kumiko Nishio, Hiroko Hasegawa, Yuko Sakakibara, Shoichi Nakazuru, Hisashi Ishida, Eiji Mita (Dept. of Gastroenterology&Hepatology,National Osaka Hospital,Osaka,Japan)

^○Minoru Murayama¹, Osamu Nakashima¹, Katsuo Yamazaki¹, Kazuo Koizumi¹, Shunichi Shiozawa², kazuhiko Yoshimatsu², Takeshi Shimakawa², Takao Katsube², Yoshihiko Naritaka² (1.Dept. of Surgery, Izumi Memorial Hosp., Tokyo, Japan, 2.Dept. of Surgery, Tokyo Women's Med Univ Med Center East, Tokyo, Japan)

^○Yusuke Horii, Osamu Dohi, Atsushi Majima, Yuriko Onozawa, Tomoko Kitaichi, Kentaro Suzuki, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Katada, Kazuhiro Kamada, Kazuhiko Uchiyama, Tsuyoshi Ishikawa, Osamu Handa, Tomohisa Takagi, Hideyuki Konishi, Yuji Naito, Yoshito Ito (Gastroenterology and Hepatology Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan)

^○Motoyuki Yoshida¹, Akira Mitoro¹, junichi Yamao², Masayoshi Sawai², Masakazu Uejima¹, Kei Moriya¹, Kousuke Takeda¹, Yasushi Ookura¹, Akitoshi Douhara¹, Kenichiro Seki¹, Koji Ishida¹, Hitoshi Yoshiji¹, Hiroshi Fukui¹ (1.3Rd Dept.Of Intermedicune,Nara Medical Univercity,Nara,Japan, 2.Dept.of Endoscopy and ultrasound,Nara medical univercity,Nara,japan)