They write: "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." In support of this statement, they cite the Glantz and Dutra cross-sectional study of e-cigarette use and smoking among youth.

The truth is that many of the electronic cigarette users in the study did not use electronic cigarettes in their quit attempts! According to data provided in the paper, a full 28% of the sample of electronic cigarettes did not use these products in their quit attempts.

To illustrate this, let's consider the five studies which the authors cite as providing evidence that electronic cigarettes inhibit smoking cessation.

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