Affiliation: | 1.Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea.;2.Department of Internal Medicine, College of Medicine, Soonchunhyang University, Cheonan, Korea.;3.Department of Internal Medicine, College of Medicine, Soonchunhyang University, Bucheon, Korea. |