1. Department of Biomedical and Biotechnological Sciences, Section of Microbiology, University of Catania, Via Santa Sofia 97, 95123 Catania (CT), Italy
2. Department of Biomedical and Biotechnological Sciences, Section of Oncologic, Clinic and General Pathology, University of Catania, Via Santa Sofia 97, 95123 Catania (CT), Italy
3. Department of Medicine and Health Sciences "Vincenzo Tiberio", University of Molise, Campobasso, Italy