1. Department of Internal Medicine; Dongguk University Medical Center; Gyeongju Korea
2. Department of Biomedical Engineering; Seoul National University College of Medicine; Seoul Korea
3. Department of Social and Preventive Medicine; Inha University College of Medicine; Incheon Korea
4. Department of Internal Medicine; Healthcare System Gangnam Center Seoul National University Hospital; Seoul Korea
5. Department of Internal Medicine; Seoul National University Bundang Hospital; Seongnam Korea
6. Kidney Research Institute; Seoul National University Hospital; Seoul Korea
7. Department of Internal Medicine; Seoul National University Hospital; Seoul Korea