RT Journal Article SR Electronic T1 Airwaves JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 739 OP 739 DO 10.1136/thx.2006.awsep06 VO 61 IS 9 A1 Wisia Wedzicha YR 2006 UL http://thorax.bmj.com/content/61/9/739.2.abstract AB