^○Mototsugu Kato (Div. of Endoscopy, Hokkaido Univ. Hospital, Sapporo, Japan)

^○Shiro Oka¹, Shinji Tanaka¹, Kazuaki Chayama² (1.Dept. of Endoscopy, Hiroshima Univ., Hiroshima, Japan, 2.Dept. of Gastroenterology and Metabolism, Hiroshima Univ., Hiroshima, Japan)

^○Kei Kawagoe, Kazutoshi Fukase, Hiroaki Takeda (Yamagata Prefectural Central Hospital, Yamagata, Japan)

^○Mikinori Kataoka¹, Motomu Tanaka², Shinji Suzuki¹ (1.Dept. of Gastroenterology and Hepatology, International University of Health and Welfare Mita Hospital, Tokyo, Japan, 2.Department of Gastroenterological Surgery, International University Of Health And Welfare Mita Hospital, Tokyo, Japan)

^○Tadahisa Inoue, Fumihiro Okumura, Hitoshi Sano (Dept. of Gastroenterology, Gifu Prefectural Tajimi Hospital, Gifu, Japan)

^○Toshihiko Arizumi¹, Kei Saito², Nobuo Toda¹ (1.Internal Medicine of Gastroenterology, Mitsui Memorial Hospital, Tokyo, Japan, 2.Internal Medicine of Gastroenterology, The Cancer Institute Hospital Of JFCR, Tokyo, Japan)

^○Naohisa Yoshida, Kiyoshi Ogiso, Yuji Naito (Dept. of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Japan)

^○Emiko Kumon, Reiji Higashi, Motowo Mizuno (Hiroshima City Hosital,Dept. of Internal Medicine,Hiroshima,Japan)

^○Yoshihiro Kondo, Naotaka Ogasawara, Kunio Kasugai (Dept. of Gastroenterology, Aichi Medical University School of Medicine, Nagakute, Japan)

^○Nobuyuki Ara, Katsunori Iijima, Toru Shimosegawa (Divsion of Gastroenterology, Tohoku University Hospital, Sendai, Japan)

^○Kimihiro Igarashi, Kohei Takizawa, Hiroyuki Ono (Div. of Endoscopy , Shizuoka Cancer Center, Japan)

^○Chiko Sato¹, Kingo Hirasawa¹, Shin Maeda² (1.Div. of Endoscopy, Yokohama City University Medical Center, Yokohama, Japan, 2.Department of Gastroenterology, Yokohama City University Graduate School of Medicine, Yokohama, Japan)

^○Hiroko Fukuda¹, Naoyuki Yamaguchi^1,2, Hajime Isomoto^1,2 (1.Dept. of Gastroenterology and Hepatology. Nagasaki University Hospital, Nagasaki, Japan, 2.Dept. of Endoscopy. Nagasaki University Hospital, Nagasaki, Japan)

^○Takuya Inoue, Masahiko Tsujii, Tetsuo Takehara (Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Japan)