@article {57, editor = {,}, title = {Review: corticosteroids plus long-acting β-agonists reduce exacerbations more than long-acting β-agonists alone in COPD}, volume = {13}, number = {2}, pages = {57--57}, year = {2008}, doi = {10.1136/ebm.13.2.57}, publisher = {Royal Society of Medicine}, issn = {1356-5524}, URL = {https://ebm.bmj.com/content/13/2/57}, eprint = {https://ebm.bmj.com/content/13/2/57.full.pdf}, journal = {BMJ Evidence-Based Medicine} }