1. Section of Dermatology, Department of Health Science University of Florence ‐ Piero Palagi Hospital Florence Italy
2. Unit of Dermatology Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
3. Department of Pathophysiology and transplantation University of Milan Milan Italy
4. Rare Skin Diseases Unit, Azienda USL Toscana Centro, ERN‐SKIN member, Department of Health Sciences University of Florence Florence Italy