1. Department of Nephrology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
2. AIT Austrian Institute of Technology, Center for Health & Bioresources, Biomedical Systems, Vienna, Austria
3. Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University of Graz, Graz, Austria
4. Institute of Medical Statistics and Epidemiology, Technical University Munich, Germany
5. Nierenzentrum 24 Bogenhausen, Munich, Germany
6. BioTechMed, Graz, Austria
7. Calciscon AG, Biel-Nidau, Switzerland