1. Department of Advanced Biomedical Sciences University of Naples Federico II Naples Italy
2. Department of Medicine, Surgery and Dentistry ‘Scuola Medica Salernitana’ University of Salerno Salerno Italy
3. Department of Dermatology Third Faculty of Medicine Charles University Prague Czech Republic
4. Department of Occupational and Environmental Dermatology Skåne University Hospital Lund University Malmö Sweden
5. Department of Dermatology Poznan University of Medical Sciences Poznan Poland
6. Department of Dermatology and Allergy National Allergy Research Centre Herlev‐Gentofte Hospital University of Copenhagen Copenhagen Denmark
7. Department of Dermatology University Hospital and Faculty of Medicine University of Coimbra Coimbra Portugal
8. Department of Dermatology, Allergology and Venereology University of Helsinki and Skin and Allergy Hospital Helsinki University Central Hospital Helsinki Finland
9. Department of Medical Informatics, Biometry and Epidemiology University of Erlangen‐Nürnberg Erlangen Germany
10. Dermatology Leeds Teaching Hospitals NHS Trust Leeds UK
11. Department of Clinical Medicine and Surgery University of Naples Federico II Naples Italy
12. Department of Dermatology, Environmental Medicine University of Osnabrueck Osnabrueck Germany
13. Department of Dermatology Hospital del Mar. Universitat Autònoma de Barcelona Barcelona Spain
14. Department of Dermatology and Venereology Otto‐von‐Guericke Universität Magdeburg Germany