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. 2020 Sep 3;11:2068. doi: 10.3389/fimmu.2020.02068

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Copyright © 2020 Kawabe, Yamamoto, Yamakawa, Katsumata, Isaka, Katsuma, Nakada, Kobayashi, Koike, Ueda, Tanno, Koike, Miki, Yamada, Kimura, Ohkido, Tsuboi, Yamamoto, Kojima and Yokoo.

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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Comparison of tonsils from patients with sleep apnoea syndrome (SAS) and native IgAN. Deposition of IgA and Gd-IgA1 at the germinal center was greater in recurrent cases (magnification, ×40).