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Microbiota β diversity (between-sample microbial diversity) based on principal coordinate analysis (PCoA) of weighted UniFrac distances. Two-dimensional PCoA plots display inter-sample distances by three principal coordinates (PC1, PC2, and PC3) with labeling of individual samples by (A) patient and (B) treatment, for patients 1 to 20. Principal coordinates, calculated from a distance matrix of weighted Unifrac distances, have no units.
