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Expressions of PD-L1, HLA class I, and CD47 in P-CSLCs. Cells were stained with PE-conjugated anti–PD-L1 antibody (A–C), FITC-conjugated anti-HLA class I antibody (D–F), and PE-conjugated anti-CD47 antibody (G–I), and then sorted using a flow cytometer. Gray histograms represent cells stained with anti–PD-L1, anti-HLA class I, or anti-CD47 antibodies. Dotted lines represent cells stained with isotype control antibodies.
