1 Department of Pediatric Nephrology, University Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; University Children's Research@Kinder-UKE, University Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; III. Department of Medicine, Nephrology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Hamburg Center for Kidney Health, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. Electronic address: a.dettmar@uke.de.
2 Department of Pediatrics, Heidelberg University Hospital, Heidelberg, Germany.
3 Department of Pediatric Nephrology, University Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; University Children's Research@Kinder-UKE, University Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Hamburg Center for Kidney Health, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.