1. Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, 90127 Palermo, Italy
2. Infectious and Tropical Disease Unit, AOU Policlinico “P. Giaccone”, Via del Vespro 129, 90127 Palermo, Italy
3. Fondazione ASIA Onlus, 20090 Buccinasco, Italy
4. Infectious Diseases Unit, AORN Sant’Anna e San Sebastiano, 81100 Caserta, Italy
5. Unit of Infectious Diseases, Santa Maria Hospital, 06156 Perugia, Italy
6. Infectious Diseases, G. Martino Hospital-University of Messina, 98147 Messina, Italy
7. Infectious Diseases, San Martino Hospital Genoa, University of Genoa, 16131 Genoa, Italy
8. Infectious Diseases Unit, Fondazione IRCCS San Gerardo dei Tintori, 20900 Monza, Italy
9. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy
10. Department of Medicine, University of Milano-Bicocca, 20126 Milano, Italy