RT Journal Article SR Electronic T1 Airwaves JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1a OP 1a DO 10.1136/thx.2004.awjan VO 60 IS 1 A1 Wisia Wedzicha YR 2005 UL http://thorax.bmj.com/content/60/1/1a.abstract AB