RT Journal Article SR Electronic T1 Trauma JF Archives of Emergency Medicine JO Arch Emerg Med FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 153 OP 154 DO 10.1136/emj.6.2.153 VO 6 IS 2 A1 I. R. Haywood YR 1989 UL http://emj.bmj.com/content/6/2/153.abstract AB