title: ETCO(2) and ultrasound fail to directly confirm the depth of ETT placement.
authors.affiliation: Department of Emergency Medicine, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. Electronic address: hoseinnejad@tums.ac.ir.
authors.forename: Hooman
authors.initials: H
authors.lastname: Hossein-Nejad
mesh_terms: D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000379:methods*; D008297:Male; D013902:Radiography, Thoracic