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They wrote: "Most studies were funded or otherwise supported/influenced by manufacturers of [e-cigarettes], but several authors had also been consultants for manufacturers of medicinal smoking cessation therapy." When I asked one of the review's authors, Martin Dssing, what he made of the current evidence base on e-cigarettes, he said, "The literature is very poor." He continued: "The most worrying aspect of e-cigarettes is that we do not know the long-term health consequences of daily use

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On the other hand, if you vape more than 20 puffs a day, then it might not last you even one week

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