title: E-cigarette data don't end debate.
authors.affiliation: CMAJ.
authors.forename: Roger
authors.initials: R
authors.lastname: Collier
mesh_terms: D002170:Canada; D066300:Electronic Nicotine Delivery Systems / Q000009:adverse effects / Q000706:statistics & numerical data*; D006801:Humans; D016540:Smoking Cessation