RT Journal Article SR Electronic T1 Ultrasound scanning in the diagnosis of acute appendicitis in pregnancy JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 359 OP 360 DO 10.1136/emj.2007.048488 VO 24 IS 5 A1 Williams, Robert A1 Shaw, Jonathan YR 2007 UL http://emj.bmj.com/content/24/5/359.2.abstract AB