1. Department of Biology, Tor Vergata University, Rome, Italy
2. Department of Experimental Medicine, Tor Vergata University, Rome, Italy
3. National Institute for Infectious Disease, IRCCS L. Spallanzani, Virology and Biosafety Laboratories Unit, Rome, Italy
4. Department of Public Health and Infectious Disease, “Sapienza” University, Rome, Italy
5. “Umberto I” University Hospital, Rome, Italy
6. Department of Gastroenterology, “S. Andrea Hospital”, Rome, Italy
7. “San Salvatore Hospital”, L’Aquila, Italy
8. Infectious Diseases Unit, Pescara General Hospital, Pescara, Italy
9. Microbiology and Virology Unit, “S. Pertini” Hospital, Rome, Italy
10. Clinic of Infectious Diseases, Department of Medicine and Science of Aging, University “G. d'Annunzio” Chieti-Pescara, Chieti, Italy
11. Infectious Diseases Unit, Tor Vergata University Hospital, Rome, Italy
12. Virology Unit, Tor Vergata University Hospital, Rome, Italy