Levine, M N Optimal duration of oral anticoagulant therapy: a randomized trial comparing four weeks with three months of warfarin in patients with proximal deep vein thrombosis. [electronic resource] - Thrombosis and haemostasis Aug 1995 - 606-11 p. digital Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0340-6245 Subjects--Topical Terms: AdultAgedAnticoagulants--administration & dosageCohort StudiesDouble-Blind MethodDrug Administration ScheduleFemaleFollow-Up StudiesHeparin--administration & dosageHumansIncidenceMaleMiddle AgedPlethysmography, ImpedanceRecurrenceRisk FactorsThrombophlebitis--diagnosisTime FactorsTreatment OutcomeWarfarin--administration & dosage