title: E-cigarettes linked to smoking among teens.
mesh_terms: D000293:Adolescent; D002487:Centers for Disease Control and Prevention, U.S.; D066300:Electronic Nicotine Delivery Systems / Q000009:adverse effects*; D006801:Humans; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology* / Q000639:trends; D014481:United States