The Narrative Review was conducted to complement the rapid review by incorporating grey literature, including non-peer-reviewed sources.
This was particularly important for addressing emerging trends and perspectives from developers, implementers, and funders. This review included 26 studies ranging from non–peer-reviewed papers to news articles, adding to the evidence from the existing literature. The narrative review blog details both the methodology used to conduct the review and the evidence identified through the process.
To know what existing research has uncovered, explore our NR Evidence Explainer!
