1. Center for Public Health, Department of Epidemiology, Medical University of Vienna, Vienna, Austria
2. Center for Medical Statistics, Informatics, and Intelligent Systems, Section for Clinical Biometrics, Medical University of Vienna, Vienna, Austria
3. Division of Nephrology and Dialysis, Department of Medicine III, Medical University of Vienna, Vienna, Austria
4. Ordensklinikum Linz, Elisabethinen Hospital, Department of Medicine III, Nephrology, Hypertension, Transplantation, Rheumatology, Geriatrics, Linz, Austria