1. Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
2. Infectious and Tropical Diseases Unit, Careggi University Hospital, Florence, Italy
3. Internal Medicine Unit 2, Careggi University Hospital, Florence, Italy
4. Microbiology and Virology Unit, Careggi University Hospital, Florence, Italy
5. Department of Hematology, Careggi University Hospital, Florence, Italy
6. Interventional Pneumology Unit, Careggi University Hospital, Florence, Italy