1. Department of Infectious and Tropical Diseases, ASST Spedali Civili General Hospital - University of Brescia, Brescia, Italy
2. Infectious Diseases Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico - University of Milan, Milan, Italy
3. Department of Anesthesiology, Neuro Intensive Care Unit, Florence Careggi University Hospital, Florence, Italy
4. Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
5. Clinical Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy
6. Department of Medical Biotechnologies, University of Siena, Siena, Italy
7. Tuscan Regional Health Agency, Florence, Italy