1. Departments of Dermatology, Venereology, Allergology and Immunology Dessau Medical Center Brandenburg Medical School Theodor Fontane Dessau Germany
2. Dermatologic Surgery Unit Department of Dermatology Ruhr‐University Bochum Bochum Germany
3. Department of Dermatology Hospital Nij Smellinghe Drachten The Netherlands
4. Division of Dermatology Memorial University of Newfoundland St. John's NL Canada
5. Department of Dermatology University Medical Center Groningen University of Groningen Groningen The Netherlands
6. Department of Dermatology St Vincent's University Hospital Dublin Ireland
7. Department of Dermatology Harvard Medical School Boston MA USA
8. Department of Dermatology Hospital de Manises Valencia Spain
9. Department of Dermatology Medical Center Klinikum Darmstadt Darmstadt Germany
10. Department of Dermatology Erasmus Medical Center Rotterdam The Netherlands
11. Department of Dermatology Zealand University Hospital University of Copenhagen Roskilde Denmark
12. Department of Dermatology Faculty of Health Sciences University Hospital of North Norway Harstad and Institute of Clinical Medicine Arctic University Tromsø Norway
13. DermaHaven Rotterdam The Netherlands