1. Department of Anaesthesiological, Surgical & Emergency Sciences, University of Campania Luigi Vanvitelli, 80138, Naples, Italy
2. Department of Clinical Medicine and Surgery, Section of Infectious Diseases, University of Naples Federico II, 80131, Naples, Italy
3. Medical Statistics Unit, University of Campania, Luigi Vanvitelli, via L. Armanni 5, 80138, Naples, Italy
4. Department of Clinical Medicine and Surgery, Hematology, University of Naples Federico II, 80131, Naples, Italy