RT Journal Article SR Electronic T1 The benefits of stopping smoking JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 51 OP 51 DO 10.1136/jech.2009.096719y VO 63 IS Suppl 2 A1 K. Pirie A1 R. Peto A1 G. Reeves A1 V. Beral YR 2009 UL http://jech.bmj.com/content/63/Suppl_2/51.abstract AB