^○Yuto Watanabe, Rintaro Mikata, Osamu Yokosuka (Dept. of Gastroenterology and Nephrology,Chiba University Graduate School of Medicine , Japan)

^○Katsuya Kitamura, Hitoshi Yoshida (Div. of Gastroenterology, Dept. of Medicine, Showa Univ. Sch. of Med., Tokyo, Japan)

^○Keisuke Iwata¹, Nobuhiro Ando¹, Ichiro Yasuda² (1.Dept. of Gastroenterology, Gifu Prefectural General Medical Center, Gifu, Japan, 2.Dep. of Gastroenterology, Teikyo University School of medicine University Hospital, Mizonokuchi, Tokyo, Japan)

^○Kazuyuki Matsumoto, Hironari Kato, Hiroyuki Okada (Dept. of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan)

^○Natsuyo Yamamoto, Hiroyuki Isayama, Kazuhiko Koike (Dept. of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.)

^○Hajime Imai, Masayuki Kitano, Masatoshi Kudo (Dept. of Gastroenterology and Hepatology, Kinki University Faculty of Med, Osaka, Japan)

^○Yousuke Nakai¹, Hiroyuki Isayama¹, Hiroshi Kawakami² (1.Departmentof Gastroenterology, Graduate School of Medicine, The University O F Tokyo, Tokyo, Japan, 2.Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan)

^○Takeshi Ogura, Tatsushi Sano, Kazuhide Higuchi (Second Dept. of Internal Medicine, Osaka Medical College, Japan)

^○Tomofumi Tsuboi, Tamito Sasaki, Kazuaki Chayama (Dept. of Gastroenterology and Metabolism,Hiroshima University Hospital,Hiroshima,Japan)

^○Shuntaro Mukai, Takayoshi Tsuchiya, Takao Itoi (Dept. of Gastroenterology and Hepatology Tokyo Medical University, Japan)