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A) Correlation between colonic volume and total breath gases (hydrogen and methane, ppm) at both time points (rho = 0.51, p < 1 x 10−5); Associations between colonic volume and the microbiota on B) phylum-level and C) family-level over both time points. BL = baseline, PI = post-intervention, OF = oligofructose, MD = maltodextrin.
