Prolonged warfarin thwarts return of clots.
D000925:Anticoagulants / Q000008:administration & dosage*; D006801:Humans; D019934:International Normalized Ratio; D012008:Recurrence; D013997:Time Factors; D020246:Venous Thrombosis / Q000517:prevention & control*; D014859:Warfarin / Q000008:administration & dosage*
D000925:Anticoagulants; D014859:Warfarin