Think of it this way: Individual X has smoked 2 packs per day for 30 years. She has tried, unsuccessfully, to quit smoking using the nicotine patch and nicotine gum. Finally, she has successfully quit smoking using electronic cigarettes.

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

You may wonder why I am calling these people - smokers who have quit smoking via electronic cigarettes - anecdotes.

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