Affiliation: | 1. Department of Pediatrics and Adolescent Medicine, University Hospital of North Norway, Tromsø, Norway;2. Department of Clinical Medicine, UiT – The Arctic University of Norway, Tromsø, Norway;3. Department of Pediatrics, Aarhus University Hospital, Aarhus, Denmark;4. Department of Ophthalmology, University Hospital of North Norway, Tromsø, Norway;5. Department of Pediatrics, Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway;6. Department of Clinical and Molecular Medicine, NTNU - Norwegian University of Science and Technology, Trondheim, Norway;7. Department of Pediatrics, University of Helsinki, Helsinki, Finland;8. Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden;9. Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;10. Department of Pediatrics, Ryhov County Hospital, Jonkoping, Sweden;11. Department of Pediatrics, Rigshospitalet University Hospital, Copenhagen, Denmark;12. Department of Ophthalmology, University of Helsinki, Helsinki University Hospital, Helsinki, Finland;13. Department of Ophthalmology, Rigshospitalet University Hospital, Copenhagen, Denmark;14. Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark;15. Department of Pediatrics, St. Olavs Hospital, Trondheim, Norway |