RT Journal Article SR Electronic T1 Correction JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 180 OP 180 DO 10.1136/thoraxjnl-2014-206260.327corr1 VO 70 IS 2 YR 2015 UL http://thorax.bmj.com/content/70/2/180.4.abstract AB