^○Ikuharu Kinoshita¹, Yasuko Uehata³, Makiko Kinoshita¹, Toshiaki Tsuzi², Youichi Fujita², Satoru Ozawa², Yoshihiro Nakatani², Masami Oka² (1.Div. of Gastroenterology, National Hospital Organization Minamiwakayama Medical Center, Wakayama, Japan, 2.Div. of Surgery, National Hospital Organization Minamiwakayama Medical Center, Wakayama, Japan, 3.Div. of Internal Medicine, National Minamiwakayama Medical Center, Wakayama, Japan)

^○Tomoji Kato, Hiroaki Ikematsu, Hiroshi Nakamura, Kenji Takashima, Takuya Honbu, Masaomi Imajyou, Tomohiro Kadota, Shozo Osera, Hiroyuki Morimoto, Tomoyuki Odagaki, Yusuke Yoda, Yasunori Oono, Tomonori Yano, KAZUHIRO KANEKO (Dept. of Gastroenterology, Div. of Endoscopy,National Cancer Center Hospital East, Kashiwa, Japan)

^○Yasuhiro Matsumoto¹, shohei ooka¹, Kei Sinoki², Kana Kawagishi¹, Kaoru Yokoyama¹, Miwa Sada¹, Kiyonori Kobayashi³, Wasaburo Koizumi¹ (1.Dept. of Gastroenterology, Kitasato University Hospital, Sagamihara, Japan, 2.Department of Gastroenterology, Toshiba Rinkan Hospital, Sagamihara, Japan, 3.New Century Medical Development Center, Kitasato University School of Medicine, Sagamihara, Japan)

^○Hiroyuki Kato¹, Hiroko Otsuka¹, Rieko Yamada¹, Kiyo Watanabe¹, Chihiro Tsunoda¹, Teruhiko Sakamoto¹, Megumi Kawashima¹, Makoto Kobayashi¹, Takako Naritaka¹, Akiyoshi Mitsumaru¹, Minoru Murayama¹, Hajime Yokomizo², kazuhiko Yoshimatsu², Yoshihiko Naritaka² (1.Dept. of Clinical Laboratory and Endoscopy, Tokyo Women'S Medical Univ. Medical Center East, Tokyo, Japan, 2.Dept. of Surgery, Tokyo Women's Medical Univ. Medical Center East, Tokyo, Japan)

^○Masatake Kuroha¹, hisashi shiga¹, tomoya kimura¹, Rintaro Moroi², naonobu yokoyama¹, katsutoshi yamamoto¹, hirohumi chiba¹, takeyuki shimoyama¹, Takeo Naito¹, Jun Kusaka¹, Motoyuki Onodera¹, Toshihiro Tadano¹, Yoko Kawakami¹, Keiichiro Hiramoto¹, Katsunori Matsushita¹, Teruko Miyazawa¹, Yoichi Kakuta¹, Katsuya Endo¹, Yoshitaka Kinouchi³, Toru Shimosegawa¹ (1.Div. of Gastroenterology, Tohoku University Graduate School of Medicine, Japan, 2.Iwate Prefectural Isawa Hospital, 3.Health Administration Center, Center for the Advancement of Higher Education, Tohoku University)