1 Department of Experimental, Diagnostic Specialty Medicine (DIMES), Dermatology, IRCCS Policlinico Sant'Orsola, Alma Mater Studiorum, University of Bologna, Italy.
2 Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Division of Oncology, IRCCS Policlinico Sant'Orsola, Sant'Orsola-Malpighi University Hospital, Bologna, Italy.
3 Department of Clinical and Experimental Oncology and Hematology, Skin Cancer Unit, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola (FC), Parma, Italy.
4 Department of Medicine and Surgery, University of Parma, Parma, Italy.