PT - JOURNAL ARTICLE ED - , AID - 10.1136/tc.8.3.340 DP - 1999 Sep 01 TA - Tobacco Control PG - 340--347 VI - 8 IP - 3 4099 - http://tobaccocontrol.bmj.com/content/8/3/340.short 4100 - http://tobaccocontrol.bmj.com/content/8/3/340.full SO - Tob Control1999 Sep 01; 8