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To study the development and progression in time of deep venous valve incompetence with Duplex ultrasonography in combination with distal cuff deflation in patients with a history of deep venous thrombosis (DVT) and to evaluate symptoms of chronic venous insufficiency (CVI).Prospective cohort study.In a long term follow-up study the deep venous system of 24 patients (7 men, 17 women, mean age 51 years)...
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