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. 2019 Jul 24;10:67. doi: 10.1186/s13244-019-0752-4

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© The Author(s). 2019

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.

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Fig. 1 — Features associated with new bone formation in the sacroiliac joints of patients with SpA. Note: erosive damage occurs before new bone formation. (SI T1W = signal intensity on T1-weighted MR images)