RT Journal Article SR Electronic T1 Parallel universes with a universal problem JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 158 OP 158 DO 10.1136/emj.2008.070938 VO 26 IS 3 A1 Geoff Hughes YR 2009 UL http://emj.bmj.com/content/26/3/158.abstract AB