RT Journal Article SR Electronic T1 Authors' response JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 81 OP 82 DO 10.1136/thoraxjnl-2011-200971 VO 67 IS 1 A1 Lee, Wai-Ting N A1 Brown, Aileen A1 Peacock, Andrew J A1 Johnson, Martin K YR 2012 UL http://thorax.bmj.com/content/67/1/81.2.abstract AB