1. Division of Nephrology and Dialysis, Department of Medicine III, Medical University of Vienna, Vienna, Austria
2. Department of Internal Medicine II, Kepler University Hospital, Med Campus III, Linz, Austria
3. Center for Medical Statistics, Informatics and Intelligent Systems, Medical University of Vienna, Vienna, Austria
4. Ludwig, Boltzmann Institute of Osteology at the Hanusch Hospital of WGKK and AUVA Trauma Centre Meidling, Vienna, Austria