1 Department of Human Pathology, Unit of Oncology, University of Messina (Italy), c/o A.O.U. "G. Martino", Via Consolare Valeria 1, 98125 Messina, Italy.
2 Department of Clinical Experimental Medicine, Unit of Dermatology, University of Messina (Italy), c/o A.O.U. "G. Martino", Via Consolare Valeria 1, 98125 Messina, Italy. Electronic address: cguarneri@unime.it.