7Heit JA. The epidemiology of venous thromboembolism in the community[J]. Arterioseler Thromb Vase Biol, 2008, 28: 370-372.
8International Union of Angiology. Prevention and treatment of venous thromboembolism. International Consensus Statement [J]. Int Angiol, 2006, 25: 101-161.
9Fraisse FHL, Couland JM, Simonneau G, et al. Nadroparin in the prevention of deep vein thrombosis in acute decompensated COPD. The Association of Non-University Affiliated Intensive Care Specialist Physicians of France[J].Am J Respir Crit Care Med, 2000, 161:1109-1114.
10Hirsh DR,Goldhaber SZ. Prevalence of deep venous thrombo- sis among patients in medical intensive care[J]. JAMA, 1995, 274 : 335-337.
