title: Contamination of opioids during preparation for regional anaesthesia.
authors.forename: M E
authors.initials: ME
authors.lastname: Tunstall
authors.forename: F M
authors.initials: FM
authors.lastname: MacLennan
mesh_terms: D000773:Anesthesia, Obstetrical / Q000379:methods*; D000775:Anesthesia, Spinal / Q000379:methods*; D018686:Anesthetics, Intravenous; D004340:Drug Contamination; D005283:Fentanyl; D006801:Humans
chemical_list: D018686:Anesthetics, Intravenous; D005283:Fentanyl