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. 2019 Dec 11;93(4):830–838. doi: 10.3382/ps.2013-03511

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© 2014 Poultry Science Association Inc.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Differentiation of 48 h interferon (IFN)γ-stimulated macrophages. Macrophages cultured for 6 d from B2 and B19 haplotypes were stimulated with IFNγ for 48 h, and pictures were taken with a Nikon Eclipse Ti fluorescence microscope (Nikon Instruments Inc., Melville, NY), inverted at 10× magnification. Macrophage-like features (stellate cytoplasmic processes, vacuolation, and decreased nuclear to cytoplasmic ratio) are more pronounced in B2 cells (A) compared with their B19 counterparts (B). Color version available in the online PDF.