1. Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
2. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
3. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
4. Department of Medical Statistics, College of Medicine, The Catholic University of Korea, Seoul, Korea
5. Kidney Research Institute, Seoul National University College of Medicine, Seoul, Korea
6. Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul, Korea