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Analysis of PD-L1 and pSTAT3/STAT3 expression by Western blot in plasma-circulating sEVs from patients with lung, breast or kidney cancer. a. Quantification of PD-L1 expression levels and statistical analysis of samples obtained. The data obtained for PD-L1 in densitometry were normalized to Ponceau values (see Supplementary Figure 4). b. Quantification of pSTAT3/STAT3 expression levels and statistical analysis of samples obtained. * p value 0.03. ns: not significant.
