1. Histologische Diagnostik Kempf und Pfaltz Zürich Switzerland
2. Department of Dermatology University Hospital Zurich Zurich Switzerland
3. Department of Dermatology, Venereology and Allergology University Medical Center Göttingen Göttingen Germany
4. Department of Pathology Saint‐Louis Hospital Assistance Publique‐Hôpitaux de Paris Paris UniversityINSERM U976 Paris France
5. Department of Dermatology Leiden University Medical Center Leiden The Netherlands
6. Department of Dermatology Medical University of Graz Graz Austria
7. Department of Health Sciences University of Florence School of Human Health Sciences Florence Italy
8. Division of Histopathology and Molecular Diagnostics Careggi University Hospital Florence Italy
9. Institute of Pathology University of Würzburg Würzburg Germany
10. Department of Clinical Pathology Leiden University Medical Center Leiden The Netherlands
11. Department of Dermatology and Venerology Semmelweis Medical University Budapest Hungary
12. Department of Dermatology‐Venereology Attikon University Hospital National Kapodistrian University of Athens Athens Greece
13. Department of Pathology Fundacion Jimenez Diaz CIBERONC Madrid Spain
14. Department of Dermatology Hospital 12 de Octubre Medical School Institute i+12 University Complutense Madrid Spain
15. Cutaneous Immunopathology Laboratory Dermatology Clinic Department of Medical Sciences University of Turin Turin Italy
16. Department of Molecular Pathology University of Pavia Pavia Italy
17. Department of Anatomic Pathology Fondazione IRCCS Policlinico San Matteo Pavia Italy
18. Dermatologic Clinic Dept Medical Sciences University of Turin Medical School Torino Italy
19. Department of Dermatology and Allergology University of Helsinki and Helsinki University Hospital Helsinki Finland
20. Department of Pathology Hospital Universitario 12 de Octubre UniversidadComplutenseInstituto de Investigación I+12 Madrid Spain
21. Department of DermatologyUniversity of Würzburg Würzburg Germany
22. Department of Consultation‐Liaison Psychiatry and Psychosomatic Medicine University Hospital Zurich Zurich Switzerland
23. Institute of Oncology Lisbon Portugal
24. LDPath London UK