^○Sho Hasegawa, Yuji Fujita, Yusuke Sekino, Kunihiro Hosono, Atsushi Nakajima, Kensuke Kubota (Dept. of Gastroenterology and Hepatology, Yokohma City University School of Medicine, Yokohama, Japan)

^○Yuki Fujiwara, Yukio Nakabayashi, Atsushi Harada, Hiroshi Sugano, Mitinori Matsumoto, Rota Noaki, Kazunao Kurihara, Masahiko Otsuka (Dept. of Digestive Surgery, Kawaguchi Municipal Medical Center, Saitama, Japan)

^○Seitaro Watanabe, Eiji Yamada, Ichiro Kawana (Div. of Gastroenterology, Saiseikai Yokohama-Shi Nanbu Hospital, Kanagawa, Japan)

^○Akihiko Ohata¹, Yasuhiko Maruyama¹, Masanobu Kageoka¹, Tomohiro Terai¹, Teruyuki Shimura¹, Masanao Kaneko¹, Koudai Yamamoto¹, Fumitoshi Watanabe² (1.Gastroenterology,Fujieda Municipal General Hospital,Shizuoka,Japan, 2.Gastroenterology,Hamamatu South Hospital,Shizuoka,Japan)

^○Yushi Imai, Masamichi Obu, Ryosaku Azemoto, Tokuhide Sugawara, Miyuki Sensui, Koji Takahashi, Masahumi Nishio, Chiaki Inagaki, Masashi Yabiki, Hiroshi Naito, Kiyofumi Ishii, tatsuya Fujimoto, Mototsugu Fujimori, Yu Yoshida, Yoshihiro Koma (Kimitu Tyuo Hospital,Chiba,Japan)