PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd AID - 10.1136/tc.8.4.426 DP - 1999 Dec 01 TA - Tobacco Control PG - 426--431 VI - 8 IP - 4 4099 - http://tobaccocontrol.bmj.com/content/8/4/426.short 4100 - http://tobaccocontrol.bmj.com/content/8/4/426.full SO - Tob Control1999 Dec 01; 8