1. Dermatology Department CHU of Saint‐Etienne Saint Etienne France
2. Dermatology Department Hospices Civils of Lyon Lyon France
3. Pathology Department LPCE CHU of Nice Nice France
4. Pathology Department CHU of Saint‐Etienne Saint‐Etienne France
5. Pathology Department Hospices Civils of Lyon Lyon France
6. Centre de Recherche Clinique INSERM U 1065 Equipe 1 CHU of Nice Nice France