Instead, in 2014, it is the electronic cigarette companies which are sending the anti-smoking messages and the health groups which are undermining those messages.

What is the new "evidence" that e-cigarettes are a gateway to smoking? According to the letter sent by these politicians to the FDA: "What’s even more troubling is that these products serve as a gateway to traditional tobacco products. A recent JAMA Pediatrics study found that middle and high-school students who used e-cigarettes were more likely to smoke traditional cigarettes and less likely to quit smoking."

The authors of this study make one of the most cardinal errors in all of epidemiology. They ignore the principle that "correlation does not equal causation."

This study provides data to support the hypothesis that among smokers who choose to quit using e-cigarettes or over-the-counter nicotine replacement products (and without behavioral support), the e-cigarettes produce about a two-fold increase in the quit rate.

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