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PRISMA flow-chart of selected criteria for the included article reports. (From: Moher, D.; Liberati, A.; Tetzlaff, J.; Altman, D.G.; Group, T.P. Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement (Reprinted from Annals of Internal Medicine). PLOS Med. 2009, 6, e1000097, doi:10.1371/journal.pmed.1000097. [26]).
