1. Department of Medicine 2, Infectious Diseases Clinic, Azienda Ospedaliera di Perugia and University of Perugia, Santa Maria Hospital, Perugia, Italy.
2. Infectious Diseases Clinic, University of Campania “Luigi Vanvitelli”, Naples, Italy.
3. Department of Woman, Newborn and Child, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy.
4. Division I of Infectious and Tropical Diseases, ASL Città di Torino, Torino, Italy.
5. Infectious Diseases Unit ASST-MONZA, San Gerardo Hospital-University of Milano-Bicocca, Monza, Italy.
6. Unit of Infectious Diseases, ASST della Valle Olona—Busto Arsizio, Busto Arsizio, Italy.
7. Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy.
8. Infectious Diseases, San Martino Policlinico Hospital Genoa, Genoa, Italy.
9. Unit of Infectious Diseases, A. Manzoni Hospital, Lecco, Italy.
10. Infectious Diseases Unit, Santa Maria Annunziata Hospital, USL Centro, Florence, Italy.
11. Infectious Disease Clinic, University of Bari, Bari, Italy.
12. Department of Medicine, Perugia University, Perugia, Italy.