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. 2020 Aug 27;11:1950. doi: 10.3389/fimmu.2020.01950

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Copyright © 2020 Pac, Bielecka, Grzela, Komarnicka, Langfort, Koltan, Dabrowska-Leonik, Bernat-Sitarz, Pronicki, Dmenska, Pituch-Noworolska, Mikoluc, Piatosa, Tkaczyk, Bernatowska, Wojsyk-Banaszak and Krenke.

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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Diffuse interstitial inflammation with small focus of organizing pneumonia (black arrow). The surrounding alveoli are filled with numerous macrophages. Microphotograph: hematoxylin and eosin stain.