Introduction: Although e-cigarette use (''vaping'') is increasing in Canada, few attempts have been made to describe e-cigarette users (''vapers''). In this context, we conducted a study in Ottawa, Canada, to describe e-cigarette users' perceptions of the benefits, harms and risks of e-cigarettes. We also collected information on why, how and where they use e-cigarettes as well as information on side effects.
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