Affiliation: | 1 Department of Gastroenterology, NTT Medical Center Tokyo, Tokyo, Japan;3 Center for Preventive Medicine, NTT Medical Center Tokyo, Tokyo, Japan;2 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan;4 Department of Endoscopy and Endoscopic Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan |