^○Miyuki Takao¹, Masahiro Sakaguchi¹, Kyowon Lee², Tadahiro Komori¹, Koji Ogawa¹, Saori Onda¹, Tatsushi Sano¹, Takanori Kuramoto¹, Shoichi Takayama², Masayoshi Nishihara², Kentaro Maruyama², Mamoru Shimada² (1.Dept. of Gastroenterology, Moriguchi Keijinkai Hospital, Japan, 2.Dept. of Surgery, Moriguchi Keijinkai Hospital)

^○Naoki Okumura, Nobuto Hirata, So Nakaji, Mitsuru Hirai, Masayoshi Kobayashi, Toshiyasu Shiratori, Kenichi Suzuki, Tatsuo Morinushi, Kenji Yamauchi (Kameda Medical Center Kamogawa Japan)

^○Kazunori Yokomine, Tsuyoshi Fujimoto, Shoko Igawa, Kazuya Miyamoto, Takashi Yamamoto, Hiroko Tone, Hisashi Hirata, Tomoko Hiyoshi, Daisuke Tanioka, Shoichi Tanaka (Dept. of Gastroenterology, National Hospital Organization Iwakuni Clinical Center, Japan)

^○Hiroki Kurumi, Yohei Takeda, Yukako Matsuki, Akeri Mitsuda, Hisao Tanaka (Dept. of Internal Medicine, Japanese Red Cross Tottori Hospital, Tottori, Japan)

^○Reiji Higashi¹, Masaki Kunihiro¹, Yuki Okamoto¹, Kentaro Furumoto¹, Yuji Fukada¹, Toru Yamabe¹, Emiko Kumon¹, Takuki Sakaguchi¹, Koki Nakamura¹, Yuki Fujii¹, Yuka Obayashi¹, Ken Hirao¹, Tsuneyoshi Ogawa¹, Masahiro Nakagawa², Motowo Mizuno¹ (1.Hiroshima City Hospital, Dept. of Internal Medicine, Hiroshima, Japan, 2.Hiroshima City Hospital, Dept. of Endoscopy, Hiroshima, Japan)