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Disconcordance between primary tumors and patient-derived xenograft models. Tumors showed remarkable differences in the expressions of CD3 (A), PD-L1 (B), and foxp3 (C). D, Histologic analysis of CD3, PD-L1, and foxp3 expressions from fresh tumor samples obtained from P3-engrafted tumor tissues. At least 3 engrafts from each case were measured and the results are expressed as the mean and SE of mean.
