Readers should be cautioned that this study should not be used to conclude that e-cigarettes are twice as effective as NRT for smoking cessation generally, for reasons explained articulately by Carl Phillips in his on this study.

"So why doesn’t the CDC include e-cigarettes among its cessation and quitting tips? “The real reason is that they don’t condone anything that looks like smoking, even if it delivers none of the smoke and even if it delivers no nicotine,” Siegel said. “It is the ideology of the smoking action that they oppose.”"

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