RT Journal Article SR Electronic T1 Correction JF BMJ Open Respiratory Research JO BMJ Open Resp Res FD British Thoracic Society SP e000022corr1 DO 10.1136/bmjresp-2014-000022corr1 VO 1 IS 1 YR 2014 UL http://bmjopenrespres.bmj.com/content/1/1/e000022corr1.abstract AB