1. Division of Nephrology, Department of Internal Medicine, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
2. Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
3. Department of Internal Medicine, College of Medicine, Institute of Kidney Disease Research, Yonsei University, Seoul, Korea.
4. Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.
6. Cancer Research Institute, Seoul National University, Seoul, Korea.
7. Department of Biomedical Science, Seoul National University Graduate School, Seoul, Korea.
8. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.