1. Laboratory of Virology, National Institute for Infectious Diseases, Lazzaro Spallanzani IRCCS, Rome, Italy
2. UOC Microbiology and Virology, San Filippo Neri Hospital, ASL Roma 1, Rome, Italy
3. North-Western Tuscany Blood Bank, Pisa University Hospital, Pisa, Italy
4. Scientific Direction, National Institute for Infectious Diseases, Lazzaro Spallanzani IRCCS, Rome, Italy