title: Letter: Fatal embolism despite low-dose heparin.
mesh_terms: D005260:Female; D006493:Heparin / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000401:mortality / Q000517:prevention & control*; D013742:Tetanus / Q000150:complications / Q000188:drug therapy*
chemical_list: D006493:Heparin