RT Journal Article SR Electronic T1 Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 498 OP 498 DO 10.1136/emj.2004.016519 VO 21 IS 4 A1 K Mackway-Jones YR 2004 UL http://emj.bmj.com/content/21/4/498.1.abstract AB