This assertion is based on a new study which found that electronic cigarette use, like smoking, results in reduced levels of exhaled nitric oxide. As Dr. Glantz writes:

This is what we call science in tobacco control today?

In other words, despite acknowledging that they cannot tell from their study whether e-cigarette use precedes smoking or whether smoking precedes e-cigarette use, they nonetheless draw the conclusion that e-cigarette use precedes smoking.

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