^○Kazuo Okumoto, Kei Mizuno, Tomohiro Katsumi, Hiroaki Haga, Hisayoshi Watanabe, Takafumi Saito, Yoshiyuki Ueno (Div. of Gastroenterology,Departoment of Internal Meicine, Yamagata University School of Medicine,Yamagata Japan)

^○Akihiko Okamura¹, Makoto Sohda², Tatsuya Miyazaki², Makoto Sakai², Hiroyuki Kuwano² (1.Sainooka Clinic, Japan, 2.Department of General Surgical Science, Gunma University,Maebasi,Japan)

^○Katsunori Ami¹, Youosuke Kawai¹, Yutaro Matsunaga¹, Nana Ohshima¹, Hidetoshi Amagasa¹, Hideaki Ganno¹, Kenichiro Imai¹, Akira Fukuda¹, Takeshi Nagahama¹, Masayuki Ando¹, Junnosuke Hayasaka², Ayako Watanabe², Eiko Okamoto², Akiko Kitazume², Atsushi Tamura², Mayumi Kondo², Kuniyoshi Arai¹ (1.Dept. of Surgery, Tokyo Metropolitan Toshima Hospital, Japan, 2.Dept. of internal medicine, Tokyo metropolitan Toshima Hospital)

^○Satoshi Osawa¹, Satoshi Suzuki², Yasushi Hamaya², Moriya Iwaizumi², Mitsushige Sugimoto², TAKAHISA FURUTA³, Ken Sugimoto² (1.Dept. of Endoscopic and Photodynamic Med., Hamamatsu Univ. Sch. of Med., Hamamatsu, Japan, 2.First Dept. of Med., Hamamatsu Univ. Sch. of Med., Hamamatsu, Japan, 3.Center for Clinical Research, Hamamatsu Univ. Sch. of Med., Hamamatsu, Japan)