Methods of reducing the risk of venous thromboembolism (VTE) in a subject undergoing
anticoagulant treatment by selectively depleting
Factor V Leiden (FVL) in a subject that is heterozygous for FVL, or replacing FVL in the
genome of a subject that is homozygous for FVL with a functional
Factor V gene, and methods of identifying a subject undergoing
anticoagulant treatment who is at risk of developing VTE are disclosed herein.