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. 2021 Feb 11;9(2):e001870. doi: 10.1136/jitc-2020-001870

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Pathological issues showing interstitial fibrosis and inflammatory infiltrate (A, B), CD8+ lymphocytic infiltrate (C) and CD68+ alveolar histiocytes (D).