RT Journal Article SR Electronic T1 Achieving prehospital analgesia JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 765 OP 766 DO 10.1136/emj.2010.095935 VO 29 IS 9 A1 Nick Castle A1 Raveen Naidoo YR 2012 UL http://emj.bmj.com/content/29/9/765.abstract AB