RT Journal Article SR Electronic T1 Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary JF Journal of Accident & Emergency Medicine JO Arch Emerg Med FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 46 OP 46 DO 10.1136/emj.17.1.46 VO 17 IS 1 A1 K Mackway-Jones YR 2000 UL http://emj.bmj.com/content/17/1/46.1.abstract AB