title: Prevention of thromboembolism.
mesh_terms: D000368:Aged; D000818:Animals; D002986:Clinical Trials as Topic; D005260:Female; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008533:Megakaryocytes; D011183:Postoperative Complications; D011817:Rabbits; D013922:Thrombocytosis / Q000209:etiology; D013923:Thromboembolism / Q000517:prevention & control*
chemical_list: D006493:Heparin