PT - JOURNAL ARTICLE AU - J E Henningfield AU - G S Zaatari TI - Electronic nicotine delivery systems: emerging science foundation for policy AID - 10.1136/tc.2009.035279 DP - 2010 Apr 01 TA - Tobacco Control PG - 89--90 VI - 19 IP - 2 4099 - http://tobaccocontrol.bmj.com/content/19/2/89.short 4100 - http://tobaccocontrol.bmj.com/content/19/2/89.full SO - Tob Control2010 Apr 01; 19