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Differences in α-diversity of gut microbiota between NCI and non-NCI groups. NCI group, HIV-infected persons with neurocognitive impairment; non-NCI, HIV-infected persons without neurocognitive impairment; ns, not significantly different α-diversity of gut microbiota from the NCI group compared with the non-NCI group. Statistical significance was set at P = 0.05. (A) Chao1 index, (B) Shannon index, and (C) Simpson index.
