RT Journal Article SR Electronic T1 BET 2. DIAGNOSTIC UTILITY OF CHEST X RAY FOR INVESTIGATION OF PULMONARY EMBOLISM JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 289 OP 290 DO 10.1136/emj.2009.072116 VO 26 IS 4 YR 2009 UL http://emj.bmj.com/content/26/4/289.3.abstract AB