1. Department of Pediatrics and Adolescent Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
2. Children and Adolescent Health, Aarhus University Hospital, Aarhus, Denmark
3. Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
4. Department of Nephrology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
5. Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark