RT Journal Article SR Electronic T1 Correction JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 98 OP 98 DO 10.1136/thoraxjnl-2013-204457.180corr1 VO 69 IS 1 YR 2014 UL http://thorax.bmj.com/content/69/1/98.abstract AB