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 662 OP 662 DO 10.1136/emermed-2015-204758.1corr1 VO 32 IS 8 YR 2015 UL http://emj.bmj.com/content/32/8/662.abstract AB