1. Section of pathology and Oncology, Department of Bio-medical Sciences, University of Catania, Catania, Italy
2. Section of Plastic Surgery, Department of Medicine and Surgery Specialities, University of Catania, Italy
3. Section of Dermatology, Department of Social Territorial Medicine, University of Messina, Messina, Italy
4. Department of Surgery, Azienda Ospedaliero-Universitaria Vittorio Emanuele-Ferrarotto-S. Bambino, Catania, Italy
5. Pathology Unit, Azienda Ospedaliero-Universitaria Vittorio Emanuele-Ferrarotto-S. Bambino, Catania, Italy
6. Brody School of Medicine at East Carolina University, Department of Microbiology & Immunology, Greenville, NC, USA