Deep vein thrombosis.  Preventing blood clots in the legs.
D000328:Adult; D000925:Anticoagulants / Q000627:therapeutic use; D006801:Humans; D007866:Leg / Q000098:blood supply*; D011655:Pulmonary Embolism / Q000209:etiology; D012039:Regional Blood Flow; D020246:Venous Thrombosis / Q000150:complications / Q000175:diagnosis / Q000517:prevention & control*
D000925:Anticoagulants