I find quite sad that an article needs to be published imploring tobacco control researchers to be honest and rigorous and to use good scientific practice and draw conclusions based on evidence rather than emotions.

Sometimes, reality isn't what it seems. And once in a rare while, it is exactly the opposite. That is the case in today's Rest of the Story.

The CDC is even worse. It actually acknowledges the existence of these former smokers, but still argues that there is no evidence that electronic cigarettes have helped any smokers quit.

Fortunately, there is a simple way to evaluate this hypothesis, at least on a preliminary basis, prior to waiting for the results of longitudinal studies. Enough youth are experimenting with electronic cigarettes, and the increase in youth e-cigarette use has been dramatic and sustained enough, that if the gateway hypothesis were correct, we would be starting to see an increase in smoking prevalence among youth due to the many new smoking initiates that were converted from e-cigarette experimentation to smoking.

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