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. 2022 May 19;9:423–436. doi: 10.2147/JHC.S363200

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Immune checkpoint genes analysis. (A) Association between risk scores and PD1, PD-L1, PD-L2, and CTLA4 expression. (B) Difference of PD1, PD-L1, PD-L2, and CTLA4 expression in higher and lower risk scores subgroups.