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 327 OP 327 DO 10.1136/emj.2005.012724corr1 VO 23 IS 4 YR 2006 UL http://emj.bmj.com/content/23/4/327.2.abstract AB