1. Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
2. Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea
3. Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
4. Department of Internal Medicine, Hallym University College of Medicine, Hwaseong, Korea
5. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
6. Department of Internal Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea
7. Department of Internal Medicine, Seoul National University College of Medicine and Liver Research Institute, Seoul, Korea
8. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
9. Department of Internal Medicine, Korea University College of Medicine, Ansan, Korea
10. Department of Internal Medicine, Hanyang University College of Medicine, Guri, Korea