title: A reply.
authors.affiliation: Stollery Children's Hospital/University of Alberta Hospital, Edmonton, Canada. btsui@ualberta.ca.
authors.forename: B C H
authors.initials: BC
authors.lastname: Tsui
mesh_terms: D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000379:methods*; D008297:Male; D009060:Mouth Floor / Q000000981:diagnostic imaging*; D018084:Ultrasonography, Interventional / Q000379:methods*