1. Department of Dermatology Medical University of Vienna Vienna Austria
2. Department of Dermatology Ordensklinikum Linz Elisabethinen Linz Austria
3. Faculty of Medicine Johannes Kepler University Linz Austria
4. Department of Dermatology, Venereology and Allergology, HELIOS St. Elisabeth Klinik Oberhausen University Witten‐Herdecke Oberhausen Germany
5. Department of Dermatology and Venereology University of Cologne Cologne Germany
6. Vita Salute University IRCSS San Raffaele Hospital Milan Italy
7. Center for Rheumatology Royal Free and University College Medical School London UK
8. Service de Médecine Interne, Centre de Référence Maladies Auto‐Immunes et Systémiques Rares d'Ile de France APHP‐CUP, Hôpital Cochin Paris France
9. Institut Cochin Université de Paris Cité Paris France
10. Laboratories for Experimental Rheumatology and Academic Division of Clinical Rheumatology, Department of Internal Medicine DiMI University Medical School of Genoa, IRCCS San Martino Genoa Genoa Italy
11. Department of Internal Medicine Ghent University Ghent Belgium
12. Department of Rheumatology Ghent University Hospital Ghent Belgium
13. Unit for Molecular Immunology and Inflammation VIB Inflammation Research Center (IRC) Ghent Belgium
14. Fondazione di Medicina Molecolare e Terapia Cellulare Università Politecnica delle Marche Ancona Italy
15. Department of Dermatology, Hôpital Saint‐Louis Université Paris Cité Paris France
16. Department of Dermatology University Hospital of Aarhus Aarhus Denmark
17. Hamburg Centre for Pediatric and Adolescent Rheumatology Schön Klinik Hamburg Eilbek Hamburg Germany
18. Dermatology & Skin Care Clinic Buochs Switzerland
19. Department of Dermatology and Venereology University of Turku and Turku University Hospital Turku Finland
20. Department of Dermatology, Venereology and Dermatooncology Semmelweis University Budapest Hungary
21. The Skin Clinic Copenhagen Denmark
22. Department of Dermatology Medical University of Warsaw Warsaw Poland
23. Department of Dermatology and Allergology University of Helsinki and Helsinki University Hospital Helsinki Finland
24. Department of Medical Sciences, Dermatologic Clinic University of Turin Turin Italy
25. Department of Dermatology and Pediatric Dermatology, National Centre for Rare Skin Disorders, Hôpital Saint‐Andre University of Bordeaux, CNRS, Immuno CencEpT, UMR 5164 Bordeaux France
26. Department of Dermatology Universitätsklinikum Erlangen Erlangen Germany
27. Department of Dermatology and Venereology University Hospital Halle Halle (Saale) Germany
28. Private Practice Vienna Austria
29. Department of Dermatology Medical University of Graz Graz Austria
30. Division of Allergy and Immunology, Department of Dermatology, Venereology and Allergology University Hospital Charité – Universitätsmedizin Berlin Berlin Germany
31. Department of Dermatology and Venereology, and Translational Matrix Biology University of Cologne Cologne Germany