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Prevalence of lifetime e-cigarette use by country [4,5,11,19,40,41,42,43,46,47,48,50,51,52,54,56,57,58,59,60,61,62,64,65,67,69,70,71,73,76,79,80]. Note 1. + Includes six European countries (Belgium, Finland, Germany, Ireland, Italy, Netherlands, Portugal). Note 2. National average is presented with the shape of a triangle and the total pooled prevalence as rhombus.
