1. Department of Paediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark
2. Department of Paediatrics and Adolescent Medicine, Lillebaelt Hospital, Kolding, Denmark
3. Department of Clinical Microbiology, Lillebaelt Hospital, Vejle, Denmark
4. Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom