1Burgquist T. Review of clinical trials of low molocular weight heparin. Eur J surg,1992,158(2) :67.
2John D. Davis MD/prevention,diagnosis and treatinent of venous thromboembolic complications, in gynecologic surgery. Am J Obstet Gynecol, 2001,184 ( 3 ) : 759.
3Greer IA. The special case of venous thromboembolism in pregnancy. Haemostasis. 1998,28 (3) : 22.