RT Journal Article SR Electronic T1 CORRECTIONS JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 844 OP 844 DO 10.1136/thx.2007.087999corr1 VO 63 IS 9 YR 2008 UL http://thorax.bmj.com/content/63/9/844.2.abstract AB