1. Seoul National University College of Medicine, Seoul, and Armed Forces Capital Hospital, Gyeonggi-do, Korea (S.P.)
2. Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Korea (S.L., Y.L., M.W.K.)
3. Keimyung University School of Medicine, Daegu, Korea (Y.K.)
4. College of Medicine, Catholic University of Korea, Seoul, Korea (K.H.)
5. Seoul National University Hospital and Kidney Research Institute, Seoul National University College of Medicine, Seoul, Korea (S.S.H., H.L., K.W.J., Y.S.K., D.K.K.)
6. Seoul National University Boramae Medical Center and Kidney Research Institute, Seoul National University College of Medicine, Seoul, Korea (J.P.L., C.S.L.)