RT Journal Article SR Electronic T1 Medical students’ knowledge of smoking JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 655 OP 655 DO 10.1136/thx.54.7.655e VO 54 IS 7 A1 BOWEN, E F A1 RAYNER, C F J YR 1999 UL http://thorax.bmj.com/content/54/7/655.6.abstract AB