title: A knotty problem resolved.
authors.forename: R
authors.initials: R
authors.lastname: Albertyn
authors.forename: J
authors.initials: J
authors.lastname: Warburton
mesh_terms: D001696:Biomechanical Phenomena; D005548:Foreign-Body Migration / Q000517:prevention & control; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation / Q000379:methods*