1. Section of Dermatology Department of Health Sciences (DISSAL) University of Genoa Genoa Italy
2. APHP Service de Dermatologie Hôpital Saint‐Louis Paris France
3. INSERM U976 Université Paris 7 Diderot, Sorbonne Paris Cité Paris France
4. Section of Biostatistics Department of Health Sciences (DISSAL) University of Genoa Genoa Italy
5. Service de Chirurgie Plastique et Reconstructrice Hôpital Saint‐Louis Paris France
6. Service d'Anatomopathologie Hôpital Saint‐Louis Paris France