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.