RT Journal Article SR Electronic T1 Sophia JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 78 OP 78 DO 10.1136/emj.2009.88526 VO 27 IS 1 YR 2010 UL http://emj.bmj.com/content/27/1/78.abstract AB