^○Norio Fukami (Div. of Gastroenterology, University of Colorado Denver, USA)

^○Tamai Naoto¹, Sumiyama Kazuki¹, Tajiri Hisao^1,2 (1.Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan, 2.Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan)

^○Oka Masashi (Dept. of Gastroenterology and Hepatology, Saitama Medical University, Japan)

^○Tanaka Kiyohito (Department of gastroenterology, Kyoto Second Red Cross Hospital, Japan)

^○Minami Hitomi, Isomoto Hajime, Nakao Kazuhiko (Dep. of Gastroenterology and Hepatology, Nagasaki University Hospital, Japan)

^○Fukami Norio (Div. of Gastroenterology, University of Colorado Denver, USA)