title: Letter: Bleeding and perioperative heparin.
mesh_terms: D000368:Aged; D003125:Colostomy; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced*; D006406:Hematoma / Q000139:chemically induced*; D006493:Heparin / Q000008:administration & dosage / Q000009:adverse effects*; D006801:Humans; D007279:Injections, Subcutaneous; D011183:Postoperative Complications / Q000517:prevention & control; D011300:Preoperative Care; D013924:Thrombophlebitis / Q000517:prevention & control
chemical_list: D006493:Heparin