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. 2020 Sep 22;10:1775. doi: 10.3389/fonc.2020.01775

FIGURE 4.

FIGURE 4

Immune cells are preserved in the ALI PDOs. ALI PDOs were stained for CD8 and granzyme B to validate the presence of immune cells. Asterisks indicate positive stained cells. Pictures were taken at 20x magnification.