^○Takahisa Kayahara¹, Masataka Kikuyama², Hiroshi Yamamoto¹, Kazuhiro Matsueda¹, Hirokazu Mori¹, Etsushi Ishida¹, Yoshie Kiyosuke¹, Tatsuhiro Yamazaki¹, Naoyuki Nishimura¹, Yosuke Mitani¹ (1.Kurashiki Central Hospital, Dept. of Gastroenterology and Hepatology, Japan, 2.Shizuoka General Hospital, Shizuoka, Japan)

^○Masaaki Okubo, TOMOYUKI SHIBATA, Tomomitsu Tahara, dai Yoshida, Tomohiko Kawamura, Noriyuki Horiguchi, Takamitsu Ishizuka, Takafumi Omori, Yasutaka Jodai, Hirokazu Ikuno, Masahiro Miyata, Nariomi Komura, Naoko Nakano, Toshiaki Kamano, Mitsuo Nagasaka, Yoshihito Nakagawa, Naoki Omiya, Ichiro Hirata (Dept. of Gastroenterology, Fujita Health University School of Medicine, Aichi, Japan)

^○Hideaki Mizuno¹, Nobutsugu Abe², Shinnichi Horiai¹, Hirohisa Takeuchi², Masanori Sugiyama² (1.Dept. of Surgery, Mejiro Second General Hospital, Japan, 2.Department of Surgery, Kyorin University School of Medicine)

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

^○Kenichiro Majima, natsuki Sasano, Teruyuki Tanaka (Dept. of Health Manegement , Kameda Medical Center ,Chiba,Japan)