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. 2021 Aug 31;35(Suppl 1):8–14. doi: 10.1038/s41379-021-00889-5

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© The Author(s), under exclusive licence to United States & Canadian Academy of Pathology 2021

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Fig. 4 — Patchy advanced pulmonary fibrosis with areas of possible sparing from low power (A) and fibroblast foci (asterisks) (B) reminiscent of UIP/IPF. Lymphoplasmacytic infiltrates in the “normal” alveolar walls (C). Numerous lymphoid follicles including some with germinal centers (arrows) (D).