PT - JOURNAL ARTICLE ED - , AID - 10.1136/tc.8.1.93 DP - 1999 Mar 01 TA - Tobacco Control PG - 93--100 VI - 8 IP - 1 4099 - http://tobaccocontrol.bmj.com/content/8/1/93.short 4100 - http://tobaccocontrol.bmj.com/content/8/1/93.full SO - Tob Control1999 Mar 01; 8