1. Dermatology Department Nantes University Hospital Nantes France
2. Department of Dermatology, Inselspital, Bern University Hospital University of Bern Bern Switzerland
3. Department of Dermatology and Venereology National Medical University Kiev Ukraine
4. Department of Dermatology Aarhus University Hospital Aarhus Denmark
5. Dermatology Unit Bambino Gesù Children's Hospital‐ IRCCS Rome Italy
6. National Expertise Center Constitutioneel Eczeem University Medical Center Utrecht Utrecht Netherlands
7. Dermatology Division Sainte‐Justine University Hospital Center Montreal Canada