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. 2018 Aug 3;5:185. doi: 10.3389/fmed.2018.00185

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Copyright © 2018 Orr, Najm, Young, McGarry, Biniecka, Fearon and Veale.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Representative photomicrographs of synovial tissue stained with haematoxylin and eosin and immunohistochemistry, for (A) CD3, scoring 3, original magnification 1 OX, and (B) CD4, scoring 1, original magnification 20X.