title: Epidural opioids in labour--do we need them?
authors.forename: E O
authors.initials: EO
authors.lastname: Thomas
mesh_terms: D015360:Analgesia, Epidural / Q000379:methods*; D016362:Analgesia, Obstetrical / Q000379:methods*; D000701:Analgesics, Opioid / Q000009:adverse effects*; D005260:Female; D005283:Fentanyl / Q000009:adverse effects*; D006801:Humans; D011247:Pregnancy
chemical_list: D000701:Analgesics, Opioid; D005283:Fentanyl