title: E-cigarettes more popular than tobacco among youth.
authors.affiliation: CMAJ.
authors.forename: Amy
authors.initials: A
authors.lastname: Thatcher
mesh_terms: D000293:Adolescent; D002170:Canada; D066300:Electronic Nicotine Delivery Systems / Q000639:trends*; D006801:Humans; D012907:Smoking / Q000639:trends*; D055815:Young Adult