1. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, South Korea;
2. Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea;
3. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, South Korea;
4. Department of Internal Medicine, Keimyung University School of Medicine, Daegu, South Korea;
5. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, South Korea;
6. Department of Family Medicine, Jeju National University School of Medicine, Jeju, South Korea;
7. Department of Internal Medicine, Jeju National University School of Medicine, Jeju, South Korea;
8. Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, South Korea;
9. Department of Internal Medicine and Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, South Korea;
10. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea;
11. Department of Internal Medicine, Seoul National University College of Medicine and Liver Research Institute, Seoul, South Korea