1. Department of Molecular Medicine, University of Padova, Italy
2. Microbiology and Virology Unit, Padova University Hospital, Italy
3. Molecular Virology Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
4. Infectious Diseases Unit, Verona University Hospital, Italy
5. Infectious Diseases Unit, Padova University Hospital, Italy
6. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Italy