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Monocyte/macrophage phenotype in cocultures with colorectal cancer stem cells and lymphocytes. Expression of CD163 (a), CD64 (b) and PD-L1 (c) in CD14+ naïve monocytes/macrophages (φ, white boxes) vs. monocytes/macrophages cocultured (T, grey boxes) for 5 days with isolated tumour cells from colorectal cancer tumour samples and lymphocytes. * p < .05, ** p < .01 using a Wilcoxon test
