1 Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy.
2 IRCCS Istituto di Ricovero e Cura a carattere Scientifico, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; Dermatology Unit, Department of Medical Science and Surgery, Alma Mater Studiorum, University of Bologna, Bologna, Italy.
4 Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy; Cancer Research "Attilia Pofferi" Foundation, Pistoia, Italy. Electronic address: vincenzo.degiorgi@unifi.it.