1. Faculty of Medicine Institute of Clinical Medicine, University of Oslo Oslo Norway
2. VID Specialized University Oslo Norway
3. OsloMET University Oslo Oslo Norway
4. Division of Paediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
5. Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
6. Astrid Lindgren Children's Hospital Karolinska University Hospital Stockholm Sweden
7. Center for Laboratory Medicine Østfold Hospital Trust Grålum Norway
8. Department of Dermatology Oslo University Hospital Oslo Norway
9. Department of Dermatology and Venaerology Oslo University Hospital Oslo Norway