It is not the case that the authors are simply unaware of the inability of their study to conclude that the e-cigarette use is leading to regular cigarette smoking. They readily acknowledge this in the study. Nevertheless, both of the authors still make conclusive statements to the public, misleading us to believe that the study demonstrates that e-cigarettes are a gateway to regular cigarette use.

To understand how ridiculous Dr. Glantz's extrapolation is, consider some of the other exposures that also cause reductions in exhaled nitric oxide:

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