Fostering transparency in e-cigarette research synthesis: the utility and limitations of methodological hierarchies.

Villanti, Andrea C; Niaura, Raymond S; Pearson, Jennifer L; Glasser, Allison M; Abrams, David B · Addiction · 2018

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Abstract

Where the evidence meets the criteria for informing the scientific question, we can begin to synthesize findings, even if only a few studies address our question of interest. The key work of our hierarchy – and of criteria like ours – is to determine which studies are informative in this regard.

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