Names and phenotypes of CD163 positive macrophages in oral precancerous lesions

We are quite interested in the recently published article entitled "Programmed death ligand 1 (PD-L1) expression and tumor microenvironment: Implications for patients with oral precancerous lesions" [1]. The authors had explored the PD-L1 expression in the stoma cells in oral precancerous lesions and investigated the relationships among PD-L1 positive cells and malignant transformation of these cells. We have two questions on this article.

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