RT Journal Article SR Electronic T1 Broadsheet JF Journal of Accident & Emergency Medicine JO Arch Emerg Med FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 200 OP 201 DO 10.1136/emj.13.3.200 VO 13 IS 3 A1 Michael McCabe YR 1996 UL http://emj.bmj.com/content/13/3/200.abstract AB