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Box 2 A note about searching

From: Extending the PRISMA statement to equity-focused systematic reviews (PRISMA-E 2012): explanation and elaboration

Caution should be used when developing the search strategy. Limiting the search using equity-related search terms is not recommended as many studies are not indexed using equity-related terms and potentially relevant studies could be missed. For equity-focused reviews, the search strategy may need to be broadened to reduce the risk of missing potentially included studies. Review authors should plan more time for screening.