The core ethical principle of transparency was spelled out in a Tobacco Control (see Fox BJ. Framing tobacco control efforts within an ethical context. Tobacco Control 2005;14[Suppl II]:ii38-ii44).

In my opinion, rather than being an objective scientific review of the literature, this article is little more than a hatchet job on e-cigarettes. The authors clearly have reached a pre-determined conclusion that e-cigarettes are not helpful in smoking cessation and they stretch science beyond recognition in trying to get the published scientific evidence to support this conclusion.

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• The truth is that there are at least 10 published studies that examined the health effects of electronic cigarettes. And this doesn't even include the more than 20 studies in which the chemical constituents of electronic cigarette liquids or vapor have been analyzed using gas chromatography/mass spectrometry.

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