title: Safety and effectiveness of epidurals.
authors.forename: M R
authors.initials: MR
authors.lastname: Duffy
authors.forename: R J
authors.initials: RJ
authors.lastname: Wood
authors.forename: M
authors.initials: M
authors.lastname: Alexander-Williams
mesh_terms: D015360:Analgesia, Epidural / Q000379:methods*; D000701:Analgesics, Opioid / Q000009:adverse effects; D003932:Heroin / Q000009:adverse effects; D006801:Humans; D010149:Postoperative Pain / Q000188:drug therapy*; D012131:Respiratory Insufficiency / Q000139:chemically induced
chemical_list: D000701:Analgesics, Opioid; D003932:Heroin