RT Journal Article SR Electronic T1 Correction JF Journal of Accident & Emergency Medicine JO Arch Emerg Med FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 271 OP 271 DO 10.1136/emj.14.4.271-c VO 14 IS 4 YR 1997 UL http://emj.bmj.com/content/14/4/271.3.abstract AB