PT - JOURNAL ARTICLE AU - Barna, Mark TI - E-cigarette use doubles among US teens, national survey finds DP - 2019 Feb 01 TA - The Nation's Health PG - 7--7 VI - 49 IP - 1 4099 - http://www.thenationshealth.org/content/49/1/7.2.short 4100 - http://www.thenationshealth.org/content/49/1/7.2.full SO - Nations Health2019 Feb 01; 49