RT Journal Article SR Electronic T1 Advertising as information JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 348 OP 348 DO 10.1136/tc.8.3.348 VO 8 IS 3 A1 SIMON CHAPMAN YR 1999 UL http://tobaccocontrol.bmj.com/content/8/3/348.abstract AB