Statistics from Altmetric.com
Contributors All authors have expertise in systematic reviews and meta-analyses. OJS and CG had the idea for the article. EGF, OJS, CG and KB located relevant literature. EGF wrote multiple drafts including the final version and is the guarantor. TL and JCJ gave statistical consultancy. All authors edited, advised and made suggestions.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
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