1. Infectious Disease Unit, Azienda Ospedaliera Universitaria Pisana, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
2. Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
3. Microbiology Unit, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
4. Faculty of Medicine, University of Pisa, Pisa, Italy
5. Operative Unit of Chemical-Clinical and Microbiological Analysis, San Luca Hospital, Lucca, Italy
6. Infectious Diseases Unit, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
7. Quality of Care and Clinical Networks, Tuscany Region, Italy
8. Agenzia Regionale di Sanità della Toscana, Florence, Italy
9. Infectious Disease Unit, Livorno Hospital, Livorno, Italy
10. Intermediate Care Unit, Florence Careggi University Hospital, Florence, Italy
11. Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy