1 Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy.
2 Dermatology Clinic, University of Catania, Catania, Italy.
3 Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy.
4 Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Unit of Clinical Pathology, Division of Clinical Genetics, University of Messina, Messina, Italy.