1. Department of Dermatology, Inselspital Bern University Hospital University of Bern Bern Switzerland
2. Dermatology Department Nantes University Hospital Nantes France
3. Department of Paediatric Dermatology Children’s Hospital Wilhelmstift Hamburg Germany
4. Department of Dermatology and Venereology National Medical University Kiev Ukraine
5. Department of Dermatology Aarhus University Hospital Aarhus Denmark
6. Dermatology Unit Bambino Gesù Children’s Hospital‐ IRCCS Rome Italy
7. National Expertise Center Constitutioneel Eczeem University Medical Center Utrecht Utrecht Netherlands
8. Division of Immunodermatology and Allergy Research Department of Dermatology and Allergy Hannover Medical School Hannover Germany
9. Department of Dermatology and Allergy University Hospital Ludwig‐Maximilian University of Munich Munich Germany