RT Journal Article SR Electronic T1 Helping people to stop smoking: the new smoking cessation guidelines JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1 OP 2 DO 10.1136/thx.54.1.1 VO 54 IS 1 A1 J BRITTON A1 A J KNOX YR 1999 UL http://thorax.bmj.com/content/54/1/1.abstract AB