FOXP3 and melanoma: Cell density and percentage were significantly correlated with CD8 and Foxp3 in the stroma region and tumor region, respectively (CD8 in stroma: Pearson's r = 0.94, CD8 in tumor: r = .98; Foxp3 in stroma: r = .88, Foxp3 in tumor: r = .99), a finding that was consistent with the results of a previous study in melanoma using HALOTM platform.22