Affiliation: | 1. The Paediatric Department, Copenhagen University Hospital, Hvidovre, Denmark;2. Hans Christian Andersen Children's Hospital, Odense, Denmark;3. Department of Paediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark;4. Department of Medical Gastroenterology and Hepatology, Rigshospitalet, Copenhagen, Denmark;5. Department of Paediatrics and Adolescent Medicine, Rigshospitalet, Copenhagen, Denmark |