^○Tatsushi Sano, Takeshi Ogura, Saori Onda, Akira Imoto, Daisuke Masuda, Kazuhide Higuchi (Second Dept. of Internal Medicine, Osaka Medical College, Japan)

^○Saburo Matsubara¹, Hiroyuki Isayama¹, Yousuke Nakai¹, Nobuyuki Tokuyama², Kazuhiro Ishigaki¹, Ryunosuke Hakuta¹, Tsuyoshi Takeda¹, Dai Akiyama¹, Kaoru Takagi¹, Naminatsu Takahara¹, Tsuyoshi Hamada¹, Hirofumi Kogure¹, Natsuyo Yamamoto¹, Dai Mouri¹, Gyotane Umefune³, Yukiko Ito³, Minoru Tada¹, Kazuhiko Koike¹ (1.Dept. of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Japan, 2.Department of gastroenterology, Tokyo Metropolitan Police Hospital, Tokyo, Japan, 3.Department of gastroenterology, Japanese Red Cross Medical Center, Tokyo, Japan)

^○Yujiro Kawakami, Kazuya Suzuki, Masakazu Akahonai, Koichiro Fukuda, Hiroshi Nasuno, Kenta Honma, Kazuhiko Yonezawa, Takashi Abe (Kushiro City General Hospital,Hokkaido,Japan)

^○Takeshi Hatanaka¹, Masashi Ijima¹, Ayako Matsui¹, Eishin Kurihara¹, Yuuta Watanuki¹, Yasumori Fukai¹, Kazuhiro Takahashi¹, Shingo Ishihara¹, Yasushi Shimada¹, Daichi Takizawa¹, Takashige Masuo¹, Ken Satou², Satoru Kakizaki², Motoyasu Kusano³, Masanobu Yamada² (1.Dept. of Internal Medicine, Isesaki Municipal Hospital, Isesaki, Gunma, Japan, 2.Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan, 3.Department of Endoscopy and Endoscopic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan)

^○Munehiro Sato¹, Koichi Furukawa¹, Osamu Yoneyama¹, Masahiro Ogawa¹, Shunzo Igarasi¹, Akihiko Oosaki¹, Tuneo Aiba¹, Nobuo Waguri¹, kentaro Igarasi¹, Naoyuki Yokoyama², Tetuya Ootani² (1.Dept. of Gastroenterology,Niigata City General Hospital,Niigata,Japan, 2.Department of Surgery,Niigata City General Hospital,Niigata,Japan)