RT Journal Article SR Electronic T1 Only naughty the first time JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 103 OP 103 DO 10.1136/tc.9.1.103 VO 9 IS 1 A1 SIMON CHAPMAN YR 2000 UL http://tobaccocontrol.bmj.com/content/9/1/103.abstract AB