RT Journal Article SR Electronic T1 Introduction JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP S3 OP S3 DO 10.1136/tc.7.suppl_1.S3 VO 7 IS suppl 1 A1 WOLFSON, DAN YR 1998 UL http://tobaccocontrol.bmj.com/content/7/suppl_1/S3.abstract AB