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Centre for Reviews and Dissemination. (2009). Chapter 6.5: Synthesis of Qualitative Research.In Systematic Reviews - CRD's Guidance for Undertaking reviews in health care. https://www.york.ac.uk/crd/SysRev/!SSL!/WebHelp/6_5_SYNTHESIS_OF_QUALITATIVE_RESEARCH.htm
Campbell, F., Smith, A., Booth, A., & Weeks, L. (2018). Rapid qualitative reviews (RQRs): what, why, how and where next? Abstracts of the 25th Cochrane Colloquium, Edinburgh, UK. Cochrane Database of Systematic Reviews. https://doi.org/10.1002/14651858.CD201801