title: The safety of low dose heparin prophylaxis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D006493:Heparin / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D008875:Middle Aged; D013924:Thrombophlebitis / Q000517:prevention & control*
chemical_list: D006493:Heparin