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PRISMA 2009 Flow Diagram. From Moher, D.; Liberati, A.; Tetzlaff, J.; Altman, D.G. The Prisma Group (2009). Preferred reporting items for systematic reviews and meta-analyses: The PRISMA statement. PLoS Med 6(7): e1000097, doi:10.1371/journal.pmed.1000097. For more information, visit www.prisma-statement.org. Accessed on 9 May 2021 [12].
