RT Journal Article SR Electronic T1 Inhaled corticosteroids and mortality in COPD JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 735 OP 735 VO 61 IS 8 A1 Ernst, P A1 Suissa, S YR 2006 UL http://thorax.bmj.com/content/61/8/735.1.abstract AB