RT Journal Article SR Electronic T1 Rectus sheath haematoma: over-diagnosis and under-diagnosis JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 49 OP 49 DO 10.1136/emj.2008.058537 VO 26 IS 1 A1 Huang, M-Y A1 Chang, W-H YR 2009 UL http://emj.bmj.com/content/26/1/49.abstract AB