Venous thromboembolism (VTE) is a collective term for deep vein thrombosis and pulmonary embolism. VTE is the third most common cardiovascular disease, causing significant morbidity and mortality. The incidence of VTE has been stable or slightly increasing during the last decades, affecting 1-2 per 1000 individuals each year. Up to half of all VTE patients have no obvious cause of the disease. Thus, ...