^○Hiroshi Kishikawa, Shogo Kaida, Jiro Nishida, Kayoko Kimura, Kyoko Arahata, Asako Ito, Sakiko Takarabe (Dept. of Gastroenterology, Tokyo Dental College Ichikawa General Hospital, Japan)

^○Tetsuya Hiraishi, Ryosuke Omi, Nozomi Sato, Midori Suzuki, Yoshichika Oishi, Yasunobu Fukuda, Satoshi Baba, Chiaki Okuse, Michihiro Suzuki (Div. of Gastroenterology and Hepatology,Dept. of Internal Medicine,Kawasaki Municipal Tama Hospital,Kawasaki,Japan)

^○Hideto Kawaratani¹, Kei Moriya², Kenichiro Seki², Hiroaki Takaya², Yasushi Ookura², Kousuke Takeda², Motoyuki Yoshida², Hisao Fujii¹, Hiroshi Fukui² (1.Dept. of Endoscopy, Nara Med. Univ., Nara, Japan, 2.Department of Gastroenterology and endocrinology, Nara Med. Univ., Nara, Japan)

^○Toshihiko Yagyu, Atsushi Hashimoto, Naoki Hayashi, Takayuki Katsuno, Masami Nakatani, Takashi Hukuda (Dept. of Gastroenterology, Minamiosaka Hospital, Osaka, Japan)

^○Akinari Takao¹, Takashi Fujiwara¹, Koichi Koizumi¹, Satomi Koizumi¹, Yuka Endo¹, Susumu Iwasaki¹, Kazuro Chiba¹, Taku Tabata², Sawako Kuruma¹, Go Kuwata¹, Junko Fujiwara², Takeo Arakawa², Kumiko Monma², Terumi Kamisawa¹, shinichiro Horiguchi³, Tunekazu Hishima³, Akihumi Imamura⁴ (1.Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan, 2.Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan, 3.Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan, 4.Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan)