RT Journal Article SR Electronic T1 Short answer question case series: diagnosis of acute cholecystitis JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 430 OP 431 DO 10.1136/emermed-2011-200867 VO 29 IS 5 A1 Beck, Josh A1 Jang, Timothy B YR 2012 UL http://emj.bmj.com/content/29/5/430.abstract AB