1. Department of Internal Medicine, Division of Nephrology University Medical Center Groningen, University of Groningen Groningen the Netherlands
2. Department of Internal Medicine, Erasmus Medical Center Erasmus University Rotterdam Rotterdam the Netherlands
3. Department of Biostatistics, Erasmus Medical Center Erasmus University Rotterdam Rotterdam the Netherlands
4. Department of Laboratory Medicine University Medical Center Groningen, University of Groningen Groningen the Netherlands
5. Department of Surgery, Division of Vascular and Transplantation Surgery University Medical Center Groningen, University of Groningen Groningen the Netherlands
6. Institute of Social and Preventive Medicine (ISPM) University of Bern Bern Switzerland
7. Department of Cardiology Bern University Hospital, University of Bern Bern Switzerland