RT Journal Article SR Electronic T1 Airwaves JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP i OP i DO 10.1136/thx.2010.156364 VO 66 IS 1 A1 Andrew Bush A1 Ian Pavord YR 2011 UL http://thorax.bmj.com/content/66/1/i.abstract AB