RT Journal Article SR Electronic T1 Authors’ response ARTICLE JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 936 OP 937 VO 63 IS 10 A1 Smyth, A A1 Bertenshaw, C A1 Lewis, S A1 Choonara, I A1 Watson, A YR 2008 UL http://thorax.bmj.com/content/63/10/936.2.abstract AB