1. Department of Dermatology University of Münster Münster Germany
2. University Medical Centre Hamburg‐Eppendorf Hamburg Germany
3. Department of Dermatology University Hospital of AntwerpUniversity of Antwerp Antwerp Belgium
4. Department of Dermatology Toulouse University Toulouse France
5. Laboratory of Cutaneous Biology Department of Surgical, Medical, Dental and Morphological Sciences University of Modena and Reggio Emilia Modena Italy
6. Department of Dermatology Hospital Infantil Universitario Niño Jesús Madrid Spain
7. Department of Dermatology Aarhus University Hospital Aarhus Denmark
8. Department for Pediatric Pneumology and Immunology Charité Medical University Berlin Germany
9. Department of Dermatology and Allergy Hannover Medical School Hannover Germany