1. Section of Clinical Biochemistry , University of Verona , P.le LA Scuro 10 , Verona 37134 , Italy
2. Laboratory Corporation of America Holdings, Colorado Coagulation , Englewood, CO , USA
3. Department of Haematology , Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital , Westmead, NSW , Australia