1. National Institute for Infectious Diseases "Lazzaro Spallanzani" IRCCS, Rome, Italy
2. Microbiology and Virology Laboratory, "S. Pertini" Hospital, Rome, Italy
3. Embassy of the Popular Jamajria of Libya in Rome, Italy
4. "El Fath" Children's Hospital, Benghazi, Libya
5. Division of Clinical Virology, Karolinska Institute at Huddinge University Hospital, Stockholm, Sweden