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. 2017 Mar 9;19:52. doi: 10.1186/s13075-017-1258-4

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© The Author(s). 2017

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. 2 — Correlation between anti-PD-1 IgG and SLE disease-related indicators including SLEDAI score (a), ESR (b), anti-dsDNA (c), and ANA (d). ANA antinuclear antibodies, ESR erythrocyte sedimentation rate, Ig immunoglobulin, PD-1 programmed cell death protein 1, SLEDAI-2 K SLE disease activity index 2000