1. Dermatology Department, Hospital del Mar Research Institute, Department of Medicine Universitat Autònoma de Barcelona (UAB) Barcelona Spain
2. Department of Dermatology University Hospital Antwerp (UZA) and Research Group Immunology, University of Antwerp Antwerp Belgium
3. Division of Allergy University Clinic of Respiratory and Allergic Diseases Golnik Golnik Slovenia
4. Department of Dermatology Coimbra University Hospital Coimbra Portugal
5. Faculty of Medicine University of Coimbra Coimbra Portugal
6. Department of Dermatology University Medical Centre Maribor Maribor Slovenia
7. Department of Dermatology Inselspital University Hospital of Bern Bern Switzerland
8. Department of Dermatology and Venereology University Hospital Center Zagreb, School of Medicine University of Zagreb Zagreb Croatia
9. Faculty of Medicine, Institute of Clinical Medicine, Clinic of Chest Diseases, Immunology and Allergology Vilnius University Vilnius Lithuania
10. Leeds Centre for Dermatology Leeds Teaching Hospitals NHS Trust, Chapel Allerton Hospital Leeds UK
11. Department of Dermatology Medical University of Poznan Poznan Poland
12. Collegium Medicum Jan Kochanowski University Kielce Kielce Poland
13. Department of Dermatology, Environmental Medicine Osnabrueck University Osnabrueck Germany
14. Dermatology Unit University of Campania “Luigi Vanvitelli” Naples Italy
15. Department of Clinical Medicine and Surgery University of Naples Federico II Naples Italy
16. Dermato‐Allergology and Occupational Dermatology Amsterdam University Medical Centers Amsterdam Netherlands
17. Dermatology Department Hospital del Mar Research Institute, Universitat Pompeu Fabra (UPF) Barcelona Spain