1. Department of Dermatology and Allergology, National Expertise Center for Atopic Dermatitis, Wilhelmina Children's Hospital University Medical Center Utrecht Utrecht The Netherlands
2. Department of Dermatology, Unit Pediatric Dermatology, SKIN Research Group, Universitair Ziekenhuis Brussel (UZ Brussel) Vrije Universiteit Brussel (VUB) Brussels Belgium
3. Department of Dermatology, University Medical Center Groningen University of Groningen Groningen The Netherlands
4. Department of Dermatology and Venereology Bispebjerg Hospital Copenhagen Denmark
5. Department of Dermatology Oslo University Hospital, Rikshospitalet Oslo Norway
6. Department of Dermatology Gent University Hospital Gent Belgium
7. Department of Dermatology Aarhus University Hospital Aarhus Denmark
8. Department of Dermatology and Venereology CHU UCL Namur Namur Belgium
9. Department of Pediatrics Turku University Hospital Turku Finland
10. Department of Dermatology, UCL St‐Luc Louvain University Brussels Belgium
11. PEDEGO Research Unit University of Oulu Oulu Finland
12. Department of Dermatology and Medical Research Center Oulu Oulu University Hospital Oulu Finland
13. Dermatology and Venereology Unit, Department of Medicine Solna Karolinska Institutet Stockholm Sweden
14. Department of Dermatology Karolinska University Hospital Stockholm Sweden
15. Department of Paediatrics Østfold Hospital Grålum Norway
16. Department of Dermatology Helsinki University Central Hospital Helsinki Finland
17. Department of Dermatology Haukeland University Hospital Bergen Norway
18. Department of Dermatology and Venereology Malmö University Hospital Malmö Sweden
19. HagaZiekenhuis/Juliana Kinderziekenhuis The Hague The Netherlands