title: US calls for more restrictions on e-cigarettes for youth.
authors.affiliation: CMAJ.
authors.forename: Jay
authors.initials: J
authors.lastname: Rankin
mesh_terms: D000293:Adolescent; D002170:Canada; D066300:Electronic Nicotine Delivery Systems / Q000331:legislation & jurisprudence*; D006801:Humans; D062789:Tobacco Products / Q000331:legislation & jurisprudence*; D014481:United States