title: Selective epidural analgesia.
mesh_terms: D000328:Adult; D000368:Aged; D000767:Anesthesia, Epidural / Q000379:methods*; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008614:Meperidine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000628:therapy*
chemical_list: D008614:Meperidine