Venous thromboembolism: epidemiology, diagnosis, prevention.
D003362:Cost-Benefit Analysis; D006801:Humans; D011183:Postoperative Complications; D011655:Pulmonary Embolism / Q000175:diagnosis; D013923:Thromboembolism / Q000191:economics; D013924:Thrombophlebitis / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control