1. Department of Dermatology Medical University of Vienna Vienna Austria
2. Department of Clinical Immunology & Transfusion Medicine University Hospital Linköping Sweden
3. Department of Dermatology University Hospital Spedali Civili Brescia Italy
4. Department of Internal Medicine I/Bone Marrow Transplantation Medical University of Vienna Vienna Austria
5. Department of Thoracic Surgery Medical University of Vienna Vienna Austria
6. Department of Dermatology Avicenne Hospital Bobigny France
7. Department of Clinical and Experimental Medicine Faculty of Health Sciences Linköping University Linköping Sweden
8. Dermatology Clinic Department of Medical Sciences University of Turin Turin Italy
9. Department of Internal Medicine III Division of Gastroenterology & Hepatology Medical University of Vienna Vienna Austria
10. Department of Dermatology University Hospital Birmingham UK
11. Department of Dermatology and Allergology University Hospital Schleswig‐Holstein Kiel Germany
12. Department of Dermatology Medical University of Graz Graz Austria
13. Department of Dermatology Charles University in Prague Prague Czech Republic
14. Department of Dermatology HELIOS Klinikum Krefeld Krefeld Germany
15. Department of Dermatology Saint Louis Hospital Université Paris 7 Sorbonne Paris Cité INSERM U976 Paris France
16. Department of Surgery University of Southern California Los Angeles USA
17. Department of Haematology and Oncology University of Strasbourg Strasbourg France
18. Department of Dermatology University Medical Centre Freiburg Freiburg Germany
19. Department of Skin Cancer Nantes University Hospital Nantes France
20. Department of Dermatology University of Heidelberg Heidelberg Germany
21. Department of Dermatology Zurich University Hospital Zurich Switzerland
22. Department of Dermatology Bispebjerg Hospital Copenhagen Denmark
23. Department of Dermatology and Venereology Otto‐von‐Guericke University Magdeburg Germany
24. Department of Dermatology and Allergology University Hospital Marburg Marburg Germany
25. Department of Dermatology, Venereology, Allergology and Immunology Dessau Medical Center Dessau Germany
26. Department of Dermatology Venereology and Allergology University Medical Centre Mannheim Ruprecht‐Karls University of Heidelberg Mannheim Germany
27. Department of Dermatology University of Münster Münster Germany
28. Department of Dermatology Athens University School of Medicine ΑΤΤΙΚΟΝ General University Hospital Athens Greece
29. Department of Dermatology and Allergology University of Helsinki and Helsinki University Central Hospital Helsinki Finland
30. Department of Dermatology Johannes Wesling Medical Centre Minden Germany
31. Department of Dermatology Charité University Hospital Berlin Germany
32. Department of Dermatology and Allergology Charité University Hospital Berlin Germany
33. Division of Dermatology Vanderbilt University School of Medicine Nashville TN USA
34. Department of Dermatology Venereology and Allergology University Duisburg‐Essen Essen Germany