1. Departments of Dermatology Saint‐Louis Hospital APHP Paris France
2. Departments of Dermatology Saint‐André Hospital CHU de Bordeaux INSERM U1053 Université de Bordeaux Bordeaux France
3. Departments of Pathology Saint‐Louis Hospital APHP Paris France
4. INSERM U976 Université Paris 7 Paris France
5. Departments of Immuno‐hematology Saint‐Louis Hospital APHP Paris France
6. Departments of Pathology Saint‐André Hospital CHU de Bordeaux INSERM U1053 Université de Bordeaux Bordeaux France