https://ki16198antagonist.com/....early-changes-in-ret
However, there clearly was large heterogeneity (I2 =88%). CONCLUSIONS even though the connection between e-cigarette use among non-smokers and subsequent cigarette smoking seems strong, the offered research is limited by the reliance on self-report actions of smoking history without biochemical verification. Nothing associated with the scientific studies included bad controls which would provide stronger research for whether the relationship is causal.
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