title: Date-expired nitrous oxide cylinders found on anaesthetic machines.
authors.forename: D N
authors.initials: DN
authors.lastname: Ranasinghe
mesh_terms: D000776:Anesthesiology / Q000295:instrumentation*; D004348:Drug Labeling; D006801:Humans; D009609:Nitrous Oxide; D017410:Practice Guidelines as Topic; D013997:Time Factors
chemical_list: D009609:Nitrous Oxide