PT - JOURNAL ARTICLE AU - Kornfield, Rachel AU - Huang, Jidong AU - Vera, Lisa AU - Emery, Sherry L TI - Rapidly increasing promotional expenditures for e-cigarettes AID - 10.1136/tobaccocontrol-2014-051580 DP - 2015 Mar 01 TA - Tobacco Control PG - 110--111 VI - 24 IP - 2 4099 - http://tobaccocontrol.bmj.com/content/24/2/110.short 4100 - http://tobaccocontrol.bmj.com/content/24/2/110.full SO - Tob Control2015 Mar 01; 24