RT Journal Article SR Electronic T1 It's not what you look at that matters, it's what you see JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 543 OP 543 DO 10.1136/emj.2010.096974 VO 28 IS 6 A1 Glazebrook, Will YR 2011 UL http://emj.bmj.com/content/28/6/543.abstract AB