title: E-cigarettes expand tobacco use among adolescents.
authors.forename: Carrie
authors.initials: C
authors.lastname: Printz
mesh_terms: D000293:Adolescent; D066300:Electronic Nicotine Delivery Systems; D006801:Humans; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology*; D064424:Tobacco Use / Q000009:adverse effects / Q000453:epidemiology*