1. AFO Medicina, UOC Medicina Interna, P.O. Santa Maria delle Grazie, ASL NA2 Nord, 80078 Pozzuoli, Italy
2. Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy
3. General Medicine Unit, Thrombotic and Haemorrhagic Disorders Unit, Department of Internal Medicine, University Hospital of Padua, 35128 Padua, Italy