1 Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
2 ERA Registry, Department of Medical Informatics, Academic Medical Center, University of Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands.
3 Department of Nephrology, OLVG Hospital, Amsterdam, The Netherlands.
4 Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands.
5 Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, Wroclaw, Poland.
6 Department of Clinical Sciences Intervention and Technology, Karolinska University Hospital Huddinge, Stockholm, Sweden.
7 Renal Unit, Southmead Hospital, Bristol, UK.
8 Division of Nephrology, Department of Medicine, University Hospital of Würzburg, Würzburg, Germany.