1. Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, The Netherlands
2. Nefrovisie Foundation, Utrecht, The Netherlands
3. Department of Internal Medicine, Medical Centre Leeuwarden, Leeuwarden, The Netherlands
4. Dutch Kidney Patients Association, Bussum, The Netherlands
5. Department of Nephrology, Amsterdam University Medical Centre, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
6. Department of Internal Medicine, Isala Hospital, Zwolle, The Netherlands
7. Department of Internal Medicine, Leiden University Medical Centre, Leiden, The Netherlands
8. Department of Internal Medicine, St Antonius Hospital, Nieuwegein, The Netherlands