1. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
2. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
3. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
4. Department of Internal Medicine, Keimyung University College of Medicine, Daegu, Korea
5. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Chungcheongnam-do, Korea
6. Departments of Family Medicine and Internal Medicine, Jeju National University School of Medicine, Jeju, Korea
7. Departments of Internal Medicine, Jeju National University School of Medicine, Jeju, Korea
8. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
9. Departments of Internal Medicine, Healthcare system Gangnam Center Seoul National University Hospital, and Healthcare Research Institute, Seoul, Korea
10. Department of Internal Medicine and Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Gyeongsangnam-do, Korea
11. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Gangwon-do, Korea
12. Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Jeollabuk-do, Korea