RT Journal Article SR Electronic T1 Correction JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 781 OP 781 DO 10.1136/thx.2010.147058corr1 VO 68 IS 8 YR 2013 UL http://thorax.bmj.com/content/68/8/781.abstract AB