1. The subjects did not consent to participate in the study.

"They still have nicotine in them."

It is not the case that the authors are simply unaware of the inability of their study to conclude that the e-cigarette use is leading to regular cigarette smoking. They readily acknowledge this in the study. Nevertheless, both of the authors still make conclusive statements to the public, misleading us to believe that the study demonstrates that e-cigarettes are a gateway to regular cigarette use.

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