1. Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy;
2. Department of Orthopaedic and Traumatology, Pellegrini Hospital, Naples, Italy;
3. Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy;
4. Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy