1. Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
2. Department of Paediatrics, Naestved Hospital, Naestved, Denmark
3. Institute for Inflammation Research, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
4. Department of Paediatrics, University Hospital of North Norway, Tromsø, Norway
5. Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden
6. Department of Paediatrics, University of Gothenburg, Gothenburg, Sweden
7. Department of Laboratory Medicine, Children’s and Women’s Health, Norwegian University of Science and Technology, Trondheim, Norway