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. 2023 Oct 24;229(2):493–501. doi: 10.1093/infdis/jiad395

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© The Author(s) 2023. Published by Oxford University Press on behalf of Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 3. — Principal component analysis plot of 8 anti-cytokine autoantibodies in CSF. The centroids for each group are indicated and surrounded with ellipses indicating 95% confidence intervals. No difference between PCC and controls for PCA1 (P = .22). The percentages captured by principal components 1 and 2 are indicated. Abbreviations: COVID-19, coronavirus disease 2019; IFN, interferon; IgG, immunoglobulin G; IL, interleukin; PCA, principal component analysis; PCC, post-COVID condition; TNF-α, tumor necrosis factor-α.