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Figure 1: Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) flow diagram showing the sequence of the literature search and the process of inclusion and exclusion of articles according to the PRISMA statement

Figure 1: Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) flow diagram showing the sequence of the literature search and the process of inclusion and exclusion of articles according to the PRISMA statement