RT Journal Article SR Electronic T1 Administration of steroids in acute exacerbations of COPD JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 142 OP 143 DO 10.1136/emj.2005.033472 VO 23 IS 2 A1 Gidwani, Shweta A1 Ferguson, Craig YR 2006 UL http://emj.bmj.com/content/23/2/142.abstract AB