1. Department of Medical Biotechnologies, University of Siena, Siena, Italy
2. Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
3. Department of Public Health and Pediatric Sciences, AOU, City of Health and Sciences, University of Turin, Turin, Italy
4. Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
5. Clinical Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy
6. Don Carlo Gnocchi Foundation, Florence, Italy