^○kaori hujiwara, ken kawakami, Takuya Inoue, Naoki Yorifuji, Munetaka Iguchi, Toshihiko Okada, Kazuki Kakimoto, Sadaharu Noda, Yousuke Abe, Toshihisa Takeuchi, Kazuhide Higuchi (2Nd Dept. of Internal Medicine Osaka Meidical College, Osaka, Japan)

^○Shigeru Kimura¹, Shinji Nagata², Shunsuke Takata², Hiroyuki Ueda² (1.Hiroshima City Asa Hospital, Dept. of Gastroenterology, Hiroshima, Japan, 2.Hiroshima City Asa Hospital, Department of Endoscopy, Hiroshima, Japan)

^○Hideki Yasuda, Yuji Ota, Satoshi Yamaguti (Fukuoka Kinen Hospital,Fukuoka,Japan)

^○Takumi Ichinona¹, Satoshi Asai¹, Kirie Hashimoto¹, Eisuke Nakao¹, Eisuke Akamine¹, Koujirou Tanoue¹, naoki fujimoto¹, Atsuhiro Ogawa² (1.Dept.Of Gastroenterology,Tane General Hospital,Osaka,Japan, 2.Dept.of Surgery,Tane general hospital,Osaka,Japan)

^○Yasunari Sakamoto¹, Taku Sakamoto², Tadahiro Honda¹, Mitsuhito Sasaki¹, Shunsuke Sugawara³, Shinichi Morita³, Yutaka Saito², Yasuaki Arai³, Takuji Okusaka¹ (1.Hepatobiliary and Pancreatic Oncology Division, National Cancer Center Hospital, Tokyo, Japan, 2.Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan, 3.Department of Diagnostic Radiology, National Cancer Center, Tokyo, Japan)