1. Department of Internal Medicine; Inje University Ilsan Paik Hospital; Goyang-si Korea
2. Department of Internal Medicine, Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
3. Department of Internal Medicine; Bundang Seoul National University College of Medicine; Seongnam-si Korea
4. Department of Internal Medicine and Liver Research Institute, Seoul National University Hospital; Seoul National University College of Medicine; Seoul Korea