^○Yuro Shimizu¹, Kuniyuki Kawano¹, Aya Ikeda¹, Atsushi Sawada¹, Kaori Kimoto¹, Takehide Fukuchi¹, Shun Teduka¹, Tomoko Ando¹, Seie Morita¹, Shigeru Iwase¹, Kuniyasu Irie² (1.Div.Of Gastroenterology,Fujisawa-City Hospital,Kanagawa,Japan, 2.Div.of gastroenterology,Kanagawa Cancer Center,Kanagawa,Japan)

^○Kentaro Ishikawa¹, Hidehiro Kamezaki², Hiroshi Oyama¹, takeshi ishihara¹, Shinichiro Nakada³, Yuusuke Nakamura³, Kouji Nakagawa³ (1.Dept. of Gastroenterology, Eastern Chiba Medical Center, Chiba, Japan, 2.Department of Internal Medicine, Eastern Chiba Medical Center, Chiba, Japan, 3.Department of Surgery, Eastern Chiba Medical Center, Chiba, Japan)

^○Tomoyasu Ito, Jinkan Sai, Ryo Kanazawa, Kou Tomishima, Hiroaki Saitou, Shuichirou Shiina, sumio watanabe (Dept. of Gastroenterology, Juntendo University, School of Medicine, Tokyo, Japan)

^○Yohei Koyama, Ken Ito, Nobuyuki Ooba, Yasutsugu Asai, Nobuhiro Dan, Yuki Takeda, Nobuo Ueki, Naoki Hirano, Shuta Nishinakagawa, Tatsuya Kojima (Div. of Gastroenterology and Hepatology, Tokyo Rosai Hospital, Tokyo, Japan)

^○Satoshi Shinya, Takamitsu Sasaki, Daisuke Kato, Yuichi Yamashita (Div. of Gastroenterological Surgery, Sch. of Med. Fukuoka Univ., Fukuoka, Japan)