PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine TI - Correction AID - 10.1136/emermed-2011-200720corr1 DP - 2011 Dec 01 TA - Emergency Medicine Journal PG - 1058--1058 VI - 28 IP - 12 4099 - http://emj.bmj.com/content/28/12/1058.short 4100 - http://emj.bmj.com/content/28/12/1058.full SO - Emerg Med J2011 Dec 01; 28