^○Maiko Kishino, Ayako Kobayashi, Hirotaka Yamamoto, Kana Yamamoto, Shinichi Nakamura, keiko shiratori (Dept. of Gastroenterology,Tokyo Women'S Medical University,Tokyo, Japan)

^○Taku Mizutani, Kenji Yamazaki, Yuuhei Iwasa, Naoki Mita, Tomohiko Sugiyama, Hiroyuki Sato, Nobuhiro Ando, Keisuke Iwata, Motoaki Imose, Syogo Shimizu, Junichi Sugihara (Gifu Prefectural General Medical Center,Gifu,Japan)

^○Kikuo Kanda¹, Akira Yamasaki¹, Takahiro Mitsui¹, Takenori Yamanouchi¹, Kazuyuki Nakahara¹, Katsunori Jin-nouchi¹, Fumio Tamura¹, Takeaki Kiyozumi¹, Ryukichi Akashi² (1.Dept. of Gastroenterology, Kumamoto Regional Medical Center, Kumamoto, Japan, 2.Health Care Center, Kumamoto city medical association, Kumamoto, Japan)

^○Fumitaka Terabe¹, Takashi Ueda¹, Jin Matsuyama², Motoyo Ito¹, Yuki Maegawa¹, Masashi Nakamura¹, Eri Tanaka¹, Osamu Tatsumi¹, Hiroyuki Fukui¹ (1.Dept. of Gastroenterology, Yao Municipal Hospital, Osaka, Japan, 2.Dept. of Surgery, Yao Municipal Hospital, Osaka, Japan)

^○Masamichi Arao, Shunya Iseki, Takahiro Inoue, Kensuke Hamada, Eri Tokunaga, Yuka Sumino, Hiroyuki Yoshida, Kanna Adachi, Yukari Shimada, Motohito Hayashi, Toshinao Itani, Jun Mimura (Nishikobe Medical Center, Japan)