1. Department of Nephrology, University Medical Center of Groningen, University of Groningen , Groningen, The Netherlands
2. Department of Nephrology, Fundación Jiménez Díaz University Hospital and IIS-FJD , Madrid, Spain
3. Haemoscan BV, Groningen , The Netherlands
4. Department of Pathology and Medical Biology, University Medical Center of Groningen, University of Groningen , Groningen, The Netherlands
5. Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield Medical School, Kidney Genetics Group, Academic Nephrology Unit , Sheffield, UK