^○Takashi Kagaya, Kazuya Kitamura, Shuichi Kaneko (Dep. of Gastroenterology, Kanazawa Univ.Hospital, Kanazawa,Japan)

^○Taisuke Kobayashi, Shingo Kato, Yuji Terai, Tetsuro Fujita, Ryoji Arai, Takeshi Otsuka, Eriko Hosomi, Masatomo Takahashi, Kenjiro Hayashi, Toru Aoyama, Katsuya Chinen, Kazuhito Kani, Yasuyo Osafune, Naoya Miyagi, Ryuichi Yamamoto, Shino Oono, Sumiko Nagoshi, Koji Yakabi (Dept.Of Gastroenterology, General Medical Center of Saitama Medical Univ., Saitama, Japan)

^○Tomoko Kuriyama, BUNEI IIZUKA, Ayumi Ito, Teppei Omori, Maria Yonezawa, Shinichi Nakamura, keiko shiratori (Div. of Gastroenterology, Tokyo Women'S Medical University Hospital, Tokyo, Japan)

^○Akira Kanamori, Takeshi Sugaya, Takahito Minaguchi, Shoko Watanabe, Atsushi Hoshino, Masakazu Nakano, Mina Hoshino, Keiichi Tominaga, Hideyuki Hiraishi (Gastroenterology,Dokkyo Medical University Hospital,Tochigi,Japan)

^○Takeo Naito, Katsuya Endo, Motoyuki Onodera, Jun Kusaka, Yoko Kawakami, Toshihiro Tadano, Keiichiro Hiramoto, Katsunori Matsushita, Teruko Miyazawa, Masatake Kuroha, tomoya kimura, hisashi shiga, Yoichi Kakuta, Yoshitaka Kinouchi, Toru Shimosegawa (Div. of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan)