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Forest plot of the relative abundance of Bifidobacterium, E. coli, Enterococcus, and Lactobacillus in ASD. (A–D) Relative abundance of Bifidobacterium, E. coli, Enterococcus, and Lactobacillus. Random-effects models were used to analyze Bifidobacterium, E. coli, and Lactobacillus, contributing to higher between-study heterogeneity (I 2 > 50%), except Enterococcus.
