1. Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, Catania, Italy
2. Intensive Care Unit, ARNAS Garibaldi Hospital, Catania, Italy
3. Intensive Care Unit, Mediterranean Institute for Transplantation and Advanced Specialized Therapies (ISMETT), Palermo, Italy
4. Infectious Diseases Unit, Cannizzaro Hospital, Catania, Italy
5. Neurologic and Respiratory Rehabilitation Unit, Casa di Cura “Mons. G. Calaciura”, Biancavilla, Italy