RT Journal Article SR Electronic T1 Non-trauma CT head scans in the emergency department: are we doing too much? JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 151 OP 151 DO 10.1136/emj.2008.060335 VO 26 IS 2 A1 P Bilbault YR 2009 UL http://emj.bmj.com/content/26/2/151.1.abstract AB