3Ferretti G, Bria E, Giannarelli D, etal. Is recurrent venous throm- boembolism after therapy reduced by low - molecular - weight heparin compared with oral anticoagulants [ J ]. Chest,2006,130 (6) :1808 - 1816.
4Geerts WH, Pineo GF, Heit JA, etal. Prevention of venous throm- boembolism: the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy [ J ]. Chest, 2004,126 ( 3 S) : 338 400.
5Lee AY. Cancer and venous thromboembolism : prevention, treat- ment and survival [ J ]. Journal of Thrombosis and Thrombolysis, 2008,25( 1 ) :33 - 36.
6Westrich GH SculcoTP. Prophylaxis against venous thromboem- bolic disease costs and controversy I J]. J Bone Joint Surg (Am) ,200211,84 (12) :2306 - 2307.
8Flam E, Berry S, Coyle A, etal. Blood flow augment - ation of in- termittent pneumatic compression systemsused for prevention of deed vein thrombosis prior to surgery [J]. Am J Surg, 1996,171 (3) :321.