FASLG and Venous thrombosis: Selection of the appropriate anticoagulant therapy should be based on the patient characteristics (age, underlying co-morbidities, bleeding risks, whether a woman is pregnant or contemplating pregnancy), the disease characteristics (type of vessels involved in thrombosis, site of thrombosis, type and number of aPL positivity, risk of recurrent thrombosis, and pregnancy loss), and treatment factor (type of anticoagulant available, safety and efficacy of anticoagulants, access to INR monitoring for VKA).