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. 2022 Sep 28;15:2065–2075. doi: 10.2147/CCID.S377759

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© 2022 Zhou et al.

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The PCoA plot with different relative abundances of OTUs among the mild, moderate, and severe acne patient groups. The severity of mild, moderate, severe acne was defined as S1 (score: 1–18), S2 (score: 19–30), and S3 (score: ≥31).