^○Reina Sasaki, Toshio Tsuyuguchi, Osamu Yokosuka (Div. of Gastroenterology, Dept. of Medicine, Sch. of Med. Chiba Univ., Chiba, Japan)

^○Masashi Kouno, Masayuki Kitano, Masatoshi Kudo (Div. of Gastroenterology, Dept. of Medicine, Sch. of Med. Kinki Univ., Osaka, Japan)

^○Nobuhito Ikeuchi, Takao Itoi, Fuminori Moriyasu (Dept. of Gastroenterology and Hepatology, Tokyo Medical University,Tokyo, Japan)

^○Masafumi Chiba¹, Hiroo Imazu¹, Takashi Umezawa² (1.Dept. of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan, 2.Div. of Gastroenterology and Hepatology, Dept. of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan)

^○Akihito Okazaki, Keiji Hanada, Yoshihiro Izumi (Gastroenterological Medicine,Ja Onomichi General Hospital,Hiroshima,Japan)

^○Shinpei Doi¹, Ichiro Yasuda¹, Takuji Iwashita² (1.Dept. of Gastroenterology, Teikyo University Mizonokuchi Hospital, Kawasaki, Japan, 2.First Department of Internal Medicine, Gifu University Hospital, Gifu, Japan)

^○Toshiyuki Mitsuyama, Masaaki Shimatani, Kazuichi Okazaki (Div. of Gastroenterology and Hepatology, Kansai Medical University, Osaka, Japan)

^○Hiroko Sato, Shomei Ryozawa, Hirotoshi Iwano (Dept. of Gastroenterology, Saitama Medical University International Medical Center, Japan)

^○Ryo Ihara, Toshiharu Ueki, Ryohei Minoda (Dept. of Gastroenterology, Fukuoka University Chikushi Hospital, Japan)

^○Tsuyoshi Mukai¹, Ichiro Yasuda², Hiroyuki Isayama³ (1.Dept. of Gastroenterology, Gifu Municipal Hosp., Gifu, Japan, 2.Dept. of Gastroenterology, Teikyo Univ. Mizonokuchi Hosp., Kawasaki, Japan, 3.Dept. of Gastroenterology, Graduate Sch. of Med., The Univ. of Tokyo, Tokyo, Japan)

^○Tadahisa Inoue, Fumihiro Okumura, Hitoshi Sano (Dept. of Gastroenterology, Gifu Prefectural Tajimi Hospital, Gifu, Japan)

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

^○Tadao Tsuji¹, Tosiharu Kakimoto², Hirosi Shinozaki² (1.Gastroenterology,Saitama Kyoudo Hospital,Kawaguchishi,Japan, 2.Gastroenterology,Saitama City Hospital,,Saitamashi)

^○Hironao Miyoshi, Kazuo Inui, Satoshi Yamamoto (Dept. of Gastroenterology, Second Teaching Hospital, Fujita Health University, Japan)