1Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
2Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
3Digestive Disease Center, Soonchunhyang University Hospital, Seoul, Korea
4Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
5Center for Gastric Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
6Department of Gastroenterology, Eulji University School of Medicine, Eulji Hospital, Seoul, Korea
7Department of Internal Medicine, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea
Copyright © 2018 Korean Society of Gastrointestinal Endoscopy
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.