1. Department of Nephrology, VU Medical Centre, Amsterdam, The Netherlands
2. Department of Nephrology, University Medical Centre Utrecht, Utrecht, The Netherlands
3. Institute for Cardiovascular Research VU Medical Centre (ICaR-VU), VU Medical Centre, Amsterdam, The Netherlands
4. Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands
5. Department of Internal Medicine, Maasstad Hospital, Rotterdam, The Netherlands
6. Department of Nephrology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
7. Department of Laboratory Medicine, Laboratory of Genetic, Endocrine and Metabolic Diseases, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
8. Hepcidinanalysis.com, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands