1. Department of Internal Medicine, Institute of Kidney Disease Research (Y.S.J., H.W.K., K.H.N., J.Y.L., J.T.P., T.-H.Y., S.-W.K., S.H.H.), College of Medicine, Yonsei University, Seoul, Republic of Korea.
2. Division of Integrated Medicine, Department of Internal Medicine (K.H.N.), College of Medicine, Yonsei University, Seoul, Republic of Korea.
3. Department of Internal Medicine, National Health Insurance Service Medical Center, Ilsan Hospital, Goyang, Republic of Korea (T.I.C.).
4. Preventive and Management Center, Inha University Hospital, Incheon, Korea (J.L.).
5. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea (S.W.K.).
6. Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Korea (Y.K.O.).
7. Department of Internal Medicine, Seoul National University Hospital, Republic of Korea (K.-H.O., C.A.).
8. Division of Nephrology, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Republic of Korea (Y.S.J.).
9. Department of Internal Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea (Y.-S.K.).