1. Department of Security and Bioethics, Infectious Disease, Catholic University of Sacred Heart, 00168 Rome, Italy
2. Infectious Diseases Unit, San Salvatore Hospital, L'Aquila, Italy.
3. Division of Infectious Diseases, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, Milan, Italy
4. Department of Medical Sciences, Infectious and Tropical Diseases Unit, University Hospital of Siena, Siena, Italy
5. Infectious and Tropical Diseases Unit, Careggi University Hospital, Florence, Italy
6. Department of Medicine, Clinic of Infectious Diseases, "Santa Maria della Misericordia" Hospital, University of Perugia, 06129 Perugia, Italy
7. Unit of Infectious Diseases, Department of Medicine, Surgery and Pharmacy, University of Sassari, 07100 Sassari, Italy
8. Department of Infectious Diseases, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
9. Department of Clinical and Experimental Medicine, Infectious diseases Unit, University of Pisa, Italy.