RT Journal Article SR Electronic T1 Where the tube is? JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 452 OP 452 DO 10.1136/emj.2010.091603 VO 28 IS 5 A1 J C CataƱo A1 M A Maya YR 2011 UL http://emj.bmj.com/content/28/5/452.abstract AB