It's not clear to me why researchers who oppose electronic cigarettes are so anxious to condemn these products that they are willing to use inappropriate research designs to fulfill such an aim.

If there were any evidence that electronic cigarettes inhibit, rather than enhance smoking cessation, I too would join Dr. Glantz's camp and oppose electronic cigarettes. But such evidence does not exist. Not a shred of it so far. Not a single study suggests that electronic cigarette use results in lower quit rates than what would occur in the absence of electronic cigarette use among smokers who try these products.

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