title: Letter: Heparin: adverse reaction.
mesh_terms: D005260:Female; D006493:Heparin / Q000008:administration & dosage / Q000009:adverse effects*; D006801:Humans; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000517:prevention & control; D013924:Thrombophlebitis / Q000517:prevention & control
chemical_list: D006493:Heparin