(See: Dutra LM, Glantz SA. Electronic cigarettes and conventional cigarette use: a cross-sectional study. Published online March 6, 2014. JAMA Pediatr. doi:10.1001/jamapediatrics.2013.5488.)

And furthermore, there is no evidence that electronic cigarettes are causing nonsmoking youth to become regular users. In fact, there is no evidence that any substantial proportion of nonsmoking youth who tried these products are continuing to use them regularly (more than once per month).

For two reasons.

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