RT Journal Article SR Electronic T1 Correction JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 308 OP 308 DO 10.1136/thoraxjnl-2014-205146.corr1 VO 69 IS 4 YR 2014 UL http://thorax.bmj.com/content/69/4/308.abstract AB