1Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center, University of Freiburg, Faculty of Medicine, Mathildenstr. 1, 79106 Freiburg, Germany
2Department of Internal Medicine IV, Medical Center, University of Freiburg, Faculty of Medicine, Freiburg, Germany
3Olga Children’s Hospital, Department of Pediatric Nephrology, Klinikum Stuttgart, Stuttgart, Germany
4University Children’s Hospital Marburg, Philipps-University, Marburg, Germany
5Paediatrics I, University Children’s Hospital, Tübingen, Germany
6University Children’s Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
7KfH-Nierenzentrum für Kinder und Jugendliche beim Clementine-Kinderhospital, Frankfurt, Germany
8Department of General Pediatrics, University Children’s Hospital, Münster, Germany
9Department of Pediatrics I, University Children’s Hospital of Heidelberg, Heidelberg, Germany
10KfH Center of Pediatric Nephrology, Children’s Hospital Munich Schwabing, Munich, Germany
11Dr. v. Hauner Children’s Hospital, Ludwig Maximilians University, Munich, Germany
12Department of Pediatrics, General Hospital, Celle, Germany
13Department of Paediatric Kidney, Liver and Metabolic Diseases, Paediatric Research Center, Hannover Medical School Children’s Hospital, Hannover, Germany