RT Journal Article SR Electronic T1 Intracranial air on plain films of the face—one sign not to miss! JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 532 OP 532 DO 10.1136/emermed-2012-201328 VO 29 IS 7 A1 Green, Adam A1 Cumberbatch, Gary L A YR 2012 UL http://emj.bmj.com/content/29/7/532.abstract AB