title: Checking the secondary oxygen supply.
authors.affiliation: Royal Alexandra Hospital, Paisley, Scotland, UK. Hilary.aitken@ggc.scot.nhs.uk.
authors.forename: H
authors.initials: H
authors.lastname: Aitken
authors.forename: S
authors.initials: S
authors.lastname: Porter
mesh_terms: D000776:Anesthesiology / Q000295:instrumentation*; D057189:Checklist; D006801:Humans