As the authors point out: "Of interest, consistent improvements in subjective and objective asthma outcomes were also observed amongst dual users (i.e., heavy reducers) with no real difference in dual compared to single users by the end of the observation period."

Today, I express my opinion that the use of these studies to draw conclusions about the efficacy of e-cigarettes for smoking cessation is not just unscientific, but dishonest as well.

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