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. 2019 Sep 27;10:2166. doi: 10.3389/fimmu.2019.02166

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Copyright © 2019 Zipfel, Wiech, Rudnick, Afonso, Person and Skerka.

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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Morphological changes in IgA nephropathy: (A) IgA immunohistochemistry of a case of IgA nephropathy, displaying a noticeable mesangial positivity. (B) PAS reaction of the same glomerulus: note the mesangial matrix increase and the focal mesangial hypercellularity (arrow).