PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/thoraxjnl-2014-206260.327corr1 DP - 2015 Feb 01 TA - Thorax PG - 180--180 VI - 70 IP - 2 4099 - http://thorax.bmj.com/content/70/2/180.4.short 4100 - http://thorax.bmj.com/content/70/2/180.4.full SO - Thorax2015 Feb 01; 70