RT Journal Article SR Electronic T1 High-grade lesion: what does it tell us? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 2 OP 3 DO 10.1136/thx.2006.067876 VO 62 IS 1 A1 E S Edell YR 2007 UL http://thorax.bmj.com/content/62/1/2.abstract AB