1. Department of Pediatrics I University Children's Hospital Heidelberg Heidelberg Germany
2. Renal Transplant Unit Bambino Gesù Children's Hospital Rome Italy
3. Institute of Medical Biometry University of Heidelberg Heidelberg Germany
4. Department of Nephrology, Kidney Transplantation and Hypertension Children's Memorial Health Institute Warsaw Poland
5. Nephrology, Dialysis and Transplantation Unit Regina Margherita University Children's Hospital Turin Italy
6. Pediatric Nephrology University Hospital Hamburg Hamburg Germany
7. Clinic for Paediatrics III Essen University Hospital Essen Germany
8. Pediatric Nephrology, Children's and Adolescents' Hospital University Hospital Cologne, Medical Faculty University of Cologne Cologne Germany
9. Pediatric Nephrology Department University Children's Hospital Zurich Zurich Switzerland
10. Pediatric Nephrology University Hospital Tübingen Tübingen Germany
11. Department of National Paediatric Renal Transplantation Children's Health Ireland at Temple Street Dublin Ireland
12. Department of Pediatrics University of Padova Padova Italy
13. KfH Kindernierenzentrum Frankfurt at Clementine Kinderhospital Frankfurt Frankfurt Germany
14. Departments of Pediatric Gastroenterology, Nephrology and Metabolic Diseases Charité University Medicine Berlin Germany
15. Pediatric Nephrology, Clinics of Stuttgart Olgahospital Stuttgart Germany
16. Department of Urology Heidelberg University Hospital Heidelberg Germany