RT Journal Article SR Electronic T1 Smoking, lung function, and mortality JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 729 OP 730 DO 10.1136/thorax.55.9.729 VO 55 IS 9 A1 N R ANTHONISEN YR 2000 UL http://thorax.bmj.com/content/55/9/729.abstract AB