1. Infectious Diseases Unit, ASST Valle Olona, Busto Arsizio Hospital, Busto Arsizio, Italy
2. Infectious Diseases Clinic and University of Genova, Genova, Italy
3. Epi2004, ASST Fatebenefratelli Sacco, Milano, Italy
4. Infectious Diseases Institute, University of Bari, Bari, Italy
5. Infectious Diseases Unit, Careggi Hospital, Firenze, Italy
6. Infectious Diseases Clinic, Santa Maria Hospital, Perugia, Italy
7. Infectious Diseases Unit and University of Milan, DIBIC Luigi Sacco, Milan, Italy
8. Clinic of Infectious Diseases, Department of Medicine and Science of Aging, University “G. d’Annunzio” Chieti-Pescara, Chieti, Italy
9. Infectious Diseases Clinic, IRCCS San Martino-IST, Genova, Italy