RT Journal Article SR Electronic T1 Airwaves JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 459 OP 459 DO 10.1136/thx.2006.awjun06 VO 61 IS 6 A1 Wisia Wedzicha YR 2006 UL http://thorax.bmj.com/content/61/6/459.2.abstract AB