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A, The direct and significant correlation between the combined positive score (CPS) evaluated with the 22C3 antibody and the SP263 antibody (Spearman r = 0.945; P < 0.0001). B, The distribution of programmed death‐ligand 1 expression as determined with the the 22C3 PharmDx assay kit and the SP263 assay for the CPS.
