1. Division of Nephorology, Department of Internal Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Seoul Republic of Korea
2. Department of Internal Medicine, CHA Bundang Medical Center CHA University School of Medicine Seongnam Republic of Korea
3. Department of Internal Medicine Hanyang University Guri Hospital, Hanyang University College of Medicine Guri Republic of Korea
4. Department of Statistics and Actuarial Science Soongsil University Seoul Republic of Korea
5. Division of Endocrinology and Metabolism, Department of Internal Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Seoul Republic of Korea