1 Pediatric Nephrology Unit, University Children's Hospital Zurich, Zurich, Switzerland.
2 Institute of Sport Science, Bundeswehr University Munich, Munich, Germany.
3 Institute of Medical Statistics and Computational Biology, University Hospital of Cologne, Cologne, Germany.
4 Pediatric Nephrology, Pediatrics II, University of Duisburg-Essen, Essen, Germany.
5 Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
6 Pediatric Nephrology, University Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
7 Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany.
8 Division of Pediatric Nephrology, Center for Pediatric and Adolescent Medicine, Heidelberg, Germany.
9 Pediatric Nephrology, Children's and Adolescents' Hospital, University of Cologne, Cologne, Germany.
10 KfH Center of Pediatric Nephrology, St Georg Hospital, Leipzig, Germany.
11 KfH Center of Pediatric Nephrology, Department of Pediatric Nephrology, Marburg, Germany.