title: Tied up in knots.
authors.forename: J S D
authors.initials: JS
authors.lastname: Allen
authors.forename: S T
authors.initials: ST
authors.lastname: Webb
mesh_terms: D004868:Equipment Failure; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D012121:Respiration, Artificial