^○Takuji Iwashita¹, Tsuyoshi Mukai¹, Ichiro Yasuda² (1.First Dept. of Internal Medicine, Gifu Univ. Hospital, Gifu, Japan, 2.Dept. of Gastroenterology, Teikyo Univ. Mizonokuchi Hospital)

^○Makoto Nishimura¹, Yasutoshi Ochiai², Naohisa Yahagi² (1.Dept. of Gastrointestinal Endosdocopy, Tokyo Geriatric Hospital , Japan, 2.Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine)

^○Takashi Sakuno¹, Reiko Yamada¹, Hiroyuki Inoue¹, Kenichiro Nishikawa¹, Shunsuke Tano², Tetsuro Harada¹, Takashi Kitade², Yasuhiko Hamada², Masaki Katsurahara², Kyosuke Tanaka², Noriyuki Horiki², Yoshiyuki Takei¹ (1.Dep. of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan, 2.Dep. of Endoscopic medicine, Mie University Graduate School of medicine, Mie, Japan)

^○Misako Tsubouchi, Kouhei Tsuchida, Mari Iwasaki, Akira Kanamori, Takahito Minaguchi, Naoya Izawa, Ruiko Hara, Naoto Yoshitake, Takako Sasai, Hideyuki Hiraishi (Gastroenterology,Dokkyo Medical University Hospital,Tochigi,Japan)

^○Kosuke Minaga¹, Yukitaka Yamashita¹, Yuko Akamatsu², Yoshito Uenoyama¹, Shunji Urai¹, Takeshi Seta¹, Takuji Akamatsu¹, Keiichi Hatamaru¹, Yasuki Nakatani¹, Hiroyoshi Iwagami¹, Hisakazu Matsumoto¹ (1.Dept. of Gastroenterology, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan, 2.Dept. of Clinical Pathology, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan)