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. 2016 Dec 3;18:289. doi: 10.1186/s13075-016-1192-x

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© The Author(s). 2016

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. 3 — Percentage of patients who, besides being classified as having systemic lupus erythematosus (SLE), also fulfilled the 2010 American College of Rheumatology/European League Against Rheumatism classification criteria for rheumatoid arthritis (RA) [43] provided they were: (1) anti-cyclic citrullinated peptide (anti-CCP) antibody-positive, (2) identified as citrulline-dependent anti-CCP antibody-positive (i.e. higher anti-CCP than cyclic arginine peptide (anti-CAP) antibody level), and (3) anti-carbamylated protein (anti-CarP) antibody-positive