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. 2015 Nov 30;17:344. doi: 10.1186/s13075-015-0800-5

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© Paulissen et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Inverse correlation between proportions of CCR6⁺CD4⁺ T cell subpopulations and disease duration in ACPA⁻ patients. Correlation of the percentage of CCR6⁺CD4⁺ cells (as percentage of total memory CD4⁺ T cells) with self-reported disease duration in ACPA⁺ and ACPA⁻ patients with RA. Pearson correlation test was used to calculate the correlation coefficients (R²) and p-values.