RT Journal Article SR Electronic T1 How much of the decrease in cancer death rates in the United States is attributable to reductions in tobacco smoking? JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 345 OP 347 DO 10.1136/tc.2006.017749 VO 15 IS 5 A1 Michael J Thun A1 Ahmedin Jemal YR 2006 UL http://tobaccocontrol.bmj.com/content/15/5/345.abstract AB