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. 2016 Sep 1;18(1):196. doi: 10.1186/s13075-016-1093-z

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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. 2 — Prevalence of peripheral manifestations in patients with ankylosing spondylitis and non-radiographic axial spondyloarthritis. a pooled prevalence difference of arthritis in patients with ankylosing spondylitis versus non-radiographic axial SpA. b pooled prevalence difference of enthesitis in patients with ankylosing spondylitis versus non-radiographic axial SpA. c pooled prevalence difference of dactylitis in patients with ankylosing spondylitis versus non-radiographic axial SpA. GESPIC GErman SPondyloarthritis Inception Cohort, SCQM Swiss Clinical Quality Management, SPACE SPondyloArthritis Caught Early, M-H Mantel-Haenszel