%0 Journal Article %A David M. Mannino %T Biomarkers in COPD: the search continues! %D 2015 %R 10.1183/09031936.00236314 %J European Respiratory Journal %P 872-874 %V 45 %N 4 %U https://erj.ersjournals.com/content/erj/45/4/872.full.pdf