RT Journal Article SR Electronic T1 Correction JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 463 OP 463 DO 10.1136/emj.2008.060061corr1 VO 25 IS 7 YR 2008 UL http://emj.bmj.com/content/25/7/463.abstract AB