1. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Messina, Messina, Italy
2. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Sassari, Sassari, Italy
3. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Catania, Catania, Italy
4. Department of Medical Oncology A, National Cancer Institute of Aviano, Aviano, Italy
5. Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
6. Department of Biomedical and Dental Sciences and Morpho Functional Imaging, University of Messina, Messina, Italy
7. Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, University of Catania, Catania, Italy
8. Department of Pharmacological Sciences, Università del Piemonte Orientale “A. Avogadro”, Novara, Italy
9. Department of Human Pathology of The Adult and The Developmental Age “G. Barresi”, Unit of Infectious Diseases, University of Messina, Messina, Italy