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. 2022 Dec 14;13:973085. doi: 10.3389/fimmu.2022.973085

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Copyright © 2022 Yin, Ling, Wei, He, Wang, Hu, Lin, Nie, Chen, Lin, Zhou, Xie, Yun, Xie, Xue and Cai

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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Histopathological classification of tertiary lymphoid structures. TLS-, without any TLSs (red arrow); Agg, Aggregates, loose, ill-defined clusters of lymphocytes (red arrow); FL-I, primary follicle, oval-shaped clusters of lymphocytes (red arrow); FL-II, secondary follicles, germinal center formation (red arrow).