1. Department of Biomedical Sciences Seoul National University College of Medicine Seoul Korea
2. Department of Internal Medicine Armed Forces Capital Hospital Seoul Korea
3. Department of Medical Statistics College of MedicineCatholic University of Korea Seoul Korea
4. Department of Internal Medicine Korea University Guro Hospital Seoul Korea
5. Department of Internal Medicine Hanyang University Guri Hospital Gyeonggi‐do Korea
6. Department of Internal Medicine Seoul National University Hospital Seoul Korea
7. Department of Internal Medicine Seoul National University College of Medicine Seoul Korea
8. Kidney Research InstituteSeoul National University Seoul Korea
9. Department of Statistics and Actuarial Science Soongsil University Seoul Korea