1 “..., and Scopus from inception of each database to 12/17/2015. Thirteen observational studies reported the details...”

2 “..., the Cochrane Library of Systematic Reviews, the Campbell Collaboration database, AMED, CINAHL, PsycInfo, Scopus...”

3 “..., the Cochrane Library of Systematic Reviews, the Campbell Collaboration database, AMED, CINAHL, PsycInfo, Scopus...”

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8 “... searched multiple electronic databases, clinical trial registries, and reference lists through February...”

9 “... controlled trial evidence. We searched 10 electronic databases to February 2014, screened reviews of reviews...”

10 “... controlled trial evidence. We searched 10 electronic databases to February 2014, screened reviews of reviews...”

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