The 27 checklist items pertain to the content of a systematic review and meta-analysis,
which include the title, abstract, methods, results, discussion and funding.
**Please note that the published PRISMA checklists contain an error in the wording
for Item 21. The item should read: "Present the main results of the review. If meta-analyses
are done, include for each, confidence intervals and measures of consistency" in
accordance with the text in the Explanation and Elaboration document.
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