1. Department of Applied Health Research Health Sciences University Medical Center Groningen University of Groningen Groningen The Netherlands
2. Department of Nephrology University Medical Center Groningen University of Groningen Groningen The Netherlands
3. Department of Nephrology University of Amsterdam's Faculty of Medicine Amsterdam The Netherlands
4. Department of Nephrology Leiden University Medical Center Leiden The Netherlands
5. Department of Health Sciences, Community and Occupational Medicine University Medical Center Groningen University of Groningen Groningen The Netherlands
6. Department of Nephrology Radboud University Medical Center Nijmegen The Netherlands