RT Journal Article SR Electronic T1 Antibiotics in COPD exacerbations: practice and evidence JF Breathe JO breathe FD European Respiratory Society SP 299 OP 301 DO 10.1183/18106838.0504.299 VO 5 IS 4 A1 M. Woodhead YR 2009 UL http://breathe.ersjournals.com/content/5/4/299.abstract AB