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Microbiota community composition of RA patients at the genus level. (A) Principal coordinate analysis plots generated from the Bray–Curtis analysis. The x and y axes represent the first and second coordinates, respectively, and values in parentheses show the percentages of the community variation explained by each coordinate. Blue and red symbols represent bacterial genera in the RA and control groups, respectively. (B) Relative abundance of genera in all subjects and in each group.
