1 Division of Dermatology and Venereology, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy - flastrucci@hotmail.it.
2 Division of Dermatology and Venereology, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy.
3 Division of Pathological Anatomy, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy.