^○Taro Abe, Koji Nakamichi, Yusuke Higuchi, Yoshihisa Fukuda, Takeshi Ninosaka, Yuta Masutani, Kanae Shinozaki, Sinji Okabayashi, Kenichiro Motozato, Yuji Tanigawa (Dept. of Gastroenterology,Fukuoka Tokusyukai Medical Center, Japan)

^○Takashi Morimoto, Masato Kawabe, Hironori Konuma, Hiroo Fukada, Yuuki Igusa, Hiroki Mori, Miho Yoshimura, Hironao Okubo, Akihisa Miyazaki (Dept. of Gastroenterology, School of Medicine, Juntendo University Nerima Hospital, Tokyo, Japan)

^○Hayato Fukui, Yasuyuki Gen, Yutaka Inada, Akifumi Fukui, Takeshi Nishimura, Kazuhiko Tokita (Dept. Gastro. Hepatol., North Med Center, Kyoto Prefectural Univ., Med., Japan)

^○Hidemasa Kikuchi, Ken Takeuchi, Hiroaki Iwashita, Taiki Sasaki, Masao Katsumata, Miyuki Miyamura, Tsunetaka Arai, Ryuichi Furukawa, Akihiro Yamada, Koji Sono, Aisaku Osamura, kentaro Nakamura, Hiroshi Aoki, Yasushi Yoshimatsu, Nobuo Takada, Yasuo Suzuki (Div. Gastroenterology, Dept. of Internal Medicine, Sakura Medical Center. Faculty of Medicine, Toho Univ , Chiba , Japan)

^○Hidehiro Kamezaki¹, Kentaro Ishikawa², Hiroshi Oyama², takeshi ishihara² (1.Dept. of Internal Medicine, Eastern Chiba Medical Center, Togane City, Chiba, Japan, 2.Department of Gastroenterology, Eastern Chiba Medical Center, Togane City, Chiba, Japan)