1. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
2. Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
3. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
4. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
5. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
6. Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea
7. Department of Internal Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea
8. Department of Internal Medicine, Inje University College of Medicine, Seoul, Korea
9. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
10. Department of Internal Medicine, Hanyang University College of Medicine, Guri, Korea