In their to this response, the authors of the study clarify their reasoning for attacking the cigarette companies, even though they merely complied with the law:

A new published online ahead of print in the journal Addiction provides evidence that electronic cigarettes may have the potential to outperform nicotine replacement therapy (NRT) for self-assisted smoking cessation.

The CDC's statement is wrong on its face. If there is reputable evidence from former smokers that e-cigarettes helped them quit smoking, then there is indeed conclusive scientific evidence that e-cigarettes "can work" as a cessation aid.

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