1. Department of Nephrology, University Medical Center Utrecht, Utrecht, The Netherlands
2. Department of Internal Medicine, Haga Hospital, The Hague, The Netherlands
3. Department of Internal Medicine, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
4. Department of Internal Medicine, Rijnstate Hospital, Arnhem, The Netherlands
5. Dutch Health Care Insurance Board, Diemen, The Netherlands
6. Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands
7. Department of Internal Medicine, Deventer Hospital, Deventer, The Netherlands
8. Department of Internal Medicine, Maasstad Hospital, Rotterdam, The Netherlands
9. Department of Nephrology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
10. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands