1. Department of Nephrology and Hypertension, University Medical Centre Utrecht, the Netherlands
2. Department of Nephrology, Amsterdam UMC, Vrije Universiteit Amsterdam, Research institute Amsterdam Cardiovascular Sciences, the Netherlands
3. Diapriva Dialysis Centre, Amsterdam, the Netherlands
4. Renal and Transplant Unit, Nottingham University NHS Trust, UK
5. Division of Nephrology and Dialysis, Clinical Hospital Centre Sestre Milosrdnice, Zagreb, Croatia
6. Service Néphrologie-Dialyse-Transplantation, Normandie University, UNICAEN, CHU de Caen Normandie, Caen, France
7. Division of Nephrology, University Clinic of Medicine, Kantonsspital Baselland, Liestal, Switzerland
8. Department of Nephrology and Dialysis, Epicura Hospitals, Mons, Belgium
9. Renal and Transplant Centre, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK
10. Department of Clinical Epidemiology, Leiden University Medical Centre, the Netherlands
11. Medical Clinic V (Nephrology, Rheumatology, Blood Purification), Academic Teaching Hospital Braunschweig, Germany
12. Division of Nephrology and Hypertension, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, Belgium
13. Department of Nephrology, Oslo University Hospital, Norway
14. Division of Renal Medicine, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
15. Service d’Endocrinologie-Néphrologie, Centre Hospitalier Pierre Oudot, Bourgoin-Jallieu, France
16. Faculty of Medicine and Health Science, Keele University, Stoke on Trent, UK
17. Centre for Nephrology Zwickau, Germany
18. Department of Nephrology, University Medical Centre Ljubljana, Slovenia and Medical Faculty, University of Ljubljana, Slovenia
19. Nephrology, Dialysis and Renal Transplant Unit, Grande Ospedale Metropolitano ‘Bianchi Melacrino Morelli’, Reggio Calabria, Italy
20. Department of Nephrology, Elche University General Hospital, Alicante, Spain
21. Faculty of Medicine, Klinikum rechts der Isar, Technical University Munich, Germany
22. Department of Nephrology, Hospital General Universitario Gregorio Marañón, Madrid, Spain
23. Department of Nephrology, Dialysis & Internal Diseases, The Medical University of Warsaw, Poland
24. Department of Nephrology, Ghent University Hospital, Belgium