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. 2022 Feb 23;12:76. doi: 10.1038/s41398-022-01844-x

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — A The ACE richness estimator, Shannon and Simpson index were analysed to determine species richness, and it was found that there was no significant difference between the ADHD and healthy-control groups. B The weighted PCoA and C unweighted PCoA plot were performed based on the OTU level to evaluate the variation in gut microbiota composition among the groups. β-diversity analysis indicates the extent of similarity between microbial communities.