RT Journal Article SR Electronic T1 Tobacco related lung diseases begin in childhood JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1063 OP 1067 DO 10.1136/thorax.55.12.1063 VO 55 IS 12 A2 P Sly A2 S Stick A1 P N Le Souëf YR 2000 UL http://thorax.bmj.com/content/55/12/1063.abstract AB