title: Low-dose heparin and deep-vein thrombosis.
mesh_terms: D000367:Age Factors; D000368:Aged; D004305:Dose-Response Relationship, Drug; D006493:Heparin / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000188:drug therapy*; D013924:Thrombophlebitis / Q000209:etiology; D013927:Thrombosis / Q000175:diagnosis / Q000209:etiology / Q000517:prevention & control*
chemical_list: D006493:Heparin