1. Infectious Diseases Clinic, University of Genova (DISSAL), Policlinico Hospital San Martino, Genova, Italy
2. Epi2004, Luigi Sacco Hospital, Milano, Italy
3. Unit of Infectious Diseases, ASST della Valle Olona, Busto Arsizio Hospital, Busto Arsizio, Italy
4. Unit of Infectious Diseases, “Divisione A,” Amedeo di Savoia Hospital, Torino, Italy
5. Unit of Infectious Diseases, “I Divisione,” Luigi Sacco Hospital, Milan, Italy
6. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
7. Infectious and Tropical Diseases Unit, Azienda Ospedaliero Universitaria Careggi, Florence, Italy
8. Infectious Diseases Unit, Santa Maria Hospital, Perugia, Italy
9. Infectious Diseases Clinic, San Gerardo Hospital, University of Milano-Bicocca, Monza, Italy
10. Infectious Diseases, Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
11. Infectious Diseases Unit, A. Manzoni Hospital, Lecco, Italy
12. Infectious Diseases Clinic, Policlinico Hospital San Martino, Genova, Italy