RT Journal Article SR Electronic T1 Biomarkers in COPD: the search continues! JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 872 OP 874 DO 10.1183/09031936.00236314 VO 45 IS 4 A1 David M. Mannino YR 2015 UL http://erj.ersjournals.com/content/45/4/872.abstract AB