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. 2016 Dec 1;18:284. doi: 10.1186/s13075-016-1181-0

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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. 1 — Levels and percentage reactivity of serum antibodies against the different citrullinated fibrinogen (cit-Fib) peptides. Comparison of the levels of antibodies against the four different cit-Fib peptides in serum from patients and controls (a. cit-Fib α35; b. cit-Fib α216;218; c. cit-Fib α263, 271; d. cit-Fib α425, 426). Horizontal dotted line indicates the ELISA cutoff for positivity towards the cit-peptide. Pie charts (bottom) represent the percentage positivity in each cohort. Number of individuals is indicated in the centre of the pie chart. RA rheumatoid arthritis