^○Joo Young Cho¹, Weon Jin Ko², Ki Baik Hahm¹, Pil Won Park¹, Kwang Hyun Ko¹, Sung Pyo Hong¹, Won Hee Kim¹, Junhwan Yoo¹, Duk Hwan Kim¹, Suk Pyo Shin¹, Ga Won Song¹, Jun-Hyung Cho² (1.Institute of Gastroenterology, CHA Bundang Medical Center, CHA University, Korea, 2.Digestive Disease Center, Soonchunhyang University Hospital, Seoul, Korea)

^○Hirohito Mori^1,2, Hideki Kobara¹, Tsutomu Masaki¹ (1.Dept. of Gastroenterology and Neurology, Kagawa University, Japan, 2.Department of Gastroenterological Surgery, Ehime Rosai Hospital, Ehime, Japan)

^○Hiroyuki Imaeda¹, Yosuke Ida², Naoki Hosoe³, Kazuhiro Kashiwagi³, Yuichi Morohoshi⁴, Hitoshi Ichikawa⁵, Minoru Yamaoka¹, Kazuaki Yoneno², Hideki Ohgo¹, Hidetomo Nakamoto¹, Haruhiko Ogata³, Naohisa Yahagi⁶, Takanori Kanai⁷ (1.Dept. of General Internal Medicine, Saitama Medical University, Saitama, Japan, 2.Department of Gastroenterology, Saitama Medical Center, Saitama, Japan, 3.Center for Diagnostic and Therapeutic Endoscopy, Keio University, Tokyo, Japan, 4.Department of Gastroenterology, Yokohama Municipal Hospital,Yokohama, Japan, 5.Department of Gastroenterology, Tokai University Hachioji Hospital,Tokyo, Japan, 6.Cancer Center,Keio University, Tokyo, Japan, 7.Division of Gastroenterology and Hepatology, Department of Internal Medicine,Keio University, Tokyo, Japan)

^○Norifumi Numata¹, Yoji Sanomura¹, Kazuaki Chayama² (1.Dept. of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan, 2.Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan)

^○Takashi Kosaka¹, Tamotsu Sugai², Takayuki Matsumoto¹ (1.Div. of Gastroenterology Dept. of Internal Medicine Iwate Medical University. , Iwate, Japan, 2.Department of Molecular Diagnostic Pathology, Iwate Medical University School of Medicine. , Iwate, Japan)