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Modified PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) diagram for type 2 diabetes mellitus (DM). The diagram shows the number of Cochrane reviews identified (n=6), the total number of trials within those reviews (n=83), and the number of unique trials once duplicate and non-English-language papers were removed (n=73). The diagram also records the data extracted from the studies in terms of our three aims.
