1. Pediatric Nephrology, Children's and Adolescents’ Hospital University of Cologne Faculty of Medicine and University Hospital Cologne Cologne Germany
2. Department of Pediatrics I University Children's Hospital Heidelberg Heidelberg Germany
3. Institute of Medical Statistics and Computational Biology Faculty of Medicine University Hospital Cologne Cologne Germany
4. Olga Children's Hospital Clinic of Stuttgart Stuttgart Germany
5. Department of General Pediatrics University Hospital Muenster Muenster Germany
6. Department of Woman's and Child's Health Pediatric Nephrology Dialysis and Transplant Unit Azienda Ospedaliera‐University of Padova Padova Italy
7. Division of Pediatric Nephrology Faculty of Medicine Ankara University Ankara Turkey
8. KfH Kidney Center for Children and Adolescents St. Georg Hospital Leipzig Germany
9. National Medical Research Center for Children’s Health, Organ Transplant Division Moscow Russian Federation
10. Pediatric Nephrology University Children's Hospital Zurich Zurich Switzerland
11. University Children's Hospital Rostock Rostock Germany
12. Renal Transplant Unit Bambino Gesù Children's Hospital IRCCS Rome Italy
13. 1st Department of Pediatrics Semmelweis University Budapest Hungary
14. MTA‐SE (Hungarian Academy of Sciences ‐ Semmelweis University) Pediatrics and Nephrology Research Group Hungarian Academy of Sciences and Semmelweis University Budapest Hungary