1 Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Via Massarenti 1, 40138, Bologna, Italy.
2 Dermatology Unit, Department of Health Sciences, University of Florence Medical School, Florence, Italy.
3 Dermatology Unit, Department of Medical Sciences, University of Turin, Turin, Italy.
4 Department of Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Canada.
5 Radiotherapy Unit, Department of Biomedical, Experimental and Clinical Sciences "Mario Serio", University of Florence Medical School, Florence, Italy.