PROS1 and Venous thrombosis: Patients who experienced venous thrombosis compared to those without thrombosis had significantly abnormal parameters of lupus anticoagulant, protein C, protein S and activated protein C resistance, though their hyper-coagulation was corrected after renal transplantation.20 In the present study there was no significant association between the incidence of catheter thrombosis and hereditary thrombophilia factors.