RT Journal Article SR Electronic T1 COPD and biomarkers: the search goes on JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1032 OP 1034 DO 10.1136/thx.2008.105957 VO 63 IS 12 A1 Gerard M Turino YR 2008 UL http://thorax.bmj.com/content/63/12/1032.abstract AB