^○Kazuhiro Kosugi, Takashi Ikeya, Mai Ego, Yuto Shimamura, Kaoru Nakano, Koichi Takagi, kenji Nakamura, Naoki Ishii, Katuyuki Fukuda, Yoshiyuki Fujita (St.Luke'S International Hospital , Dept. of Gastroenterology, Tokyo , Japan)

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

^○Shuji Saito¹, Yuji Yamamoto¹, Tomoko Wada¹, Yasuo Ogasawara¹, Seigo Hiratani¹, Tetsuya Shimizu¹, Goro Matsuda¹, Atsushi Okitsu², Nao Okuno², Yuko Tamura², Yasumasa Shiobara², Haruka Noto², Daisuke Suzuki², Shouzo Matsushima², Tatsuji Komatsu², Hitoshi Sekido¹ (1.Dept. of Surgery, National Hospital Organization Yokohama Medical Center, Yokohama, Japan, 2.Dept. of Gastroenterology, National Hospital Organization Yokohama Medical Center, Yokohama, Japan)

^○Akiko Narita¹, Shuntaro Yoshida^1,2, Yumiko Ota¹, Takayuki Shimpou¹, Naminatsu Takahara¹, Atsuo Yamada¹, Yoshihiro Hirata¹, Hiroyuki Isayama¹, Kazuhiko Koike¹ (1.Dept. of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 2.Department of Endoscopy and Endoscopic Surgery, The University of Tokyo Hospital, Tokyo, Japan)

^○Masahiko Aoki¹, Satoshi Tokioka¹, Ken Narabayashi¹, Ai Hirai¹, Yujiro Henmi¹, Yosuke Inoue¹, Eiko Kuwakado¹, Takeshi Yamano¹, Yoshihide Chino², Isao Satou², Masaki Fujimura², Kazuhide Higuchi³ (1.First Towakai Hospital,Gastroenterological Internalmedicine,Osaka,Japan, 2.First Towakai hospital,Gastroenterological surgery,Osaka,Japan, 3.2nd Department of Internal Medicine Osaka Medical College,Osaka,Japan)