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Table 1 PD-L1 expression based on the percent-positive tumor cells by immunohistochemical staining

From: PD-L1 expression and its clinicopathological correlation in advanced esophageal squamous cell carcinoma in a Chinese population

PD-L1 expression in tumor cells (%)

< 1%

1–9%

10–49%

≥50%

Overall

265(70.1%)

51(13.5%)

34(9.0%)

28(7.4%)

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