1. Department of Infectious Diseases, University of Barcelona, IDIBAPS, Barcelona, Spain
2. Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
3. Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy
4. Department of Medicine, University of Udine, Udine, Italy
5. Institute of Clinical Pharmacology, Santa Maria Della Misericordia University Hospital of Udine, Udine, Italy