1. Department of Dermatology; Başkent University Faculty of Medicine; Ankara; Turkey
2. Dermatology and Allergy Department; Université Pierre et Marie Curie, Tenon Hospital; Paris; France
3. Department of Dermatology; Hospices Civils de Lyon, Edouard Herriot Hospital Group; Lyon; France
4. Department of Dermatology; Medical University of Vienna; Vienna; Austria
5. Service de Dermatologie; Hôpital Erasme, Université Libre Bruxelles; Brussels; Belgium
6. Centre for Cutaneous Research; Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London; London; United Kingdom
7. Department of Dermatology; Oxford Radcliffe Hospitals; Oxford; United Kingdom
8. Department of Public Health; Başkent University Faculty of Medicine; Ankara; Turkey
9. APHP Service de Dermatologie; Hopital Saint-Louis, Université Paris Diderot; Paris; France
10. Clinica Dermatologica; Università di Padova; Padova; Italy
11. Department of Dermatology; Centre Hospitalier Universitaire Vaudois, and University of Lausanne; Lausanne; Switzerland
12. St John's Institute of Dermatology; St Thomas' Hospital; London; United Kingdom
13. Department of Dermatology; Leiden University Medical Centre; Leiden; the Netherlands
14. Department of Dermatology; Beaumont Hospital; Dublin; Ireland
15. Hospital Universitario Germans Trias I Pujol; Universidad Autónoma de Barcelona; Badalona; Spain
16. Department of Dermatology; Rikshospitalet University Hospital; Oslo; Norway
17. Department of Dermatology; Charles University Hospital; Pilsen, The Czech Republic
18. Department of Dermatology; University Hospital Zürich; Zürich; Switzerland