1. Department of Dermatology Henri Mondor University Hospital, AP‐HP Créteil France
2. Department of Pathology Henri Mondor University Hospital, AP‐HP Créteil France
3. Department of Dermatology University Hospital of Toulouse Toulouse France
4. Department of Dermatology Saint Louis University Hospital, APHP Paris France
5. Department of Pathology Saint Louis University Hospital, APHP Paris France
6. Department of Dermatology University Hospital of Rouen Rouen France
7. Department of Dermatology CHU Bordeaux and INSERM U1312 Bordeaux France
8. Department of Dermatology University Hospital Avicenne Bobigny France
9. Department of Dermatology University Hospital of Brest Brest France
10. Department of Dermatology Hopital d'Instruction des Armées Brest France
11. Department of Dermatology Hospital of Boulogne‐sur‐Mer Boulogne‐sur‐Mer France
12. Department of Dermatology and Clinical Immunology Guadeloupe University Hospital Pointe‐à‐Pitre France
13. Department of Pathology Cochin Hospital, AP‐HP, AP‐HP, Centre‐Université de Paris Paris France
14. Department of Pathology University Hospital of Rouen Rouen France
15. Derpartment of Pathology University Hospital of Toulouse Toulouse France
16. Department of Pathology University Hospital of Lille Lille France
17. Department of Pathology University Hospital of Brest Brest France
18. Cabinet de Pathologie Mathurin Moreau Paris France
19. Department of Immunology Bichat University Hospital Paris France
20. Department of Immunology University Hospital of Rouen Rouen France
21. Department of Dermatology Hospital of Marne la Vallée Jossigny France
22. Department of Dermatology Cochin Hospital, AP‐HP, AP‐HP, Centre‐Université de Paris Paris France
23. Department of Dermatology Hospital of Dunkerque Dunkerque France
24. Department of Dermatology University Hospital of Lille Lille France
25. Univ Paris Est Créteil EpidermE Créteil France