1. University Division of Infectious and Tropical Diseases, University of Brescia and Spedali Civili General Hospital, Brescia, Italy.
2. Department of Clinical, Experimental and Oncological Medicine, Division of Infectious Diseases, University of Sassari, Italy.
3. Department of Infectious Diseases, Santa Maria Della Misericordia Hospital, Rovigo, Italy.
4. Department of Infectious Diseases, Galliera Hospital, Genoa, Italy.
5. Second Department of Infectious Diseases, L. Sacco Hospital, Milan, Italy.
6. Operative Unit of Infectious Diseases, University Hospital Policlinico S. Orsola Malpighi, Bologna, Italy.
7. Roche SpA, Monza, Italy.
8. SPARC Consulting, Milan, Italy.
9. Department of Infectious Diseases, Niguarda Cà Granda Hospital, Milan, Italy.