1 Skin Cancer Unit, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola, Forlì-Cesena, Italy - francescosavoia76@virgilio.it.
2 Skin Cancer Unit, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola, Forlì-Cesena, Italy.
3 Pathology Unit, Santa Maria delle Croci Hospital, AUSL della Romagna, Ravenna, Italy.
4 Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.
5 Department of Experimental, Diagnostic and Specialty Medicine, Alma Mater Studiorum, University of Bologna, Bologna, Italy.
6 Dermatology Unit, Department of Clinical and Experimental Medicine, Parma, Italy.