%0 Journal Article %A P J Howlett %A T P Chua %T Pneumopericardium: diagnosing a rare entity with bedside imaging %D 2011 %R 10.1136/emermed-2011-200530 %J Emergency Medicine Journal %P 1082-1082 %V 28 %N 12 %U https://emj.bmj.com/content/emermed/28/12/1082.1.full.pdf