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M2 macrophage subtypes. IL: Interleukin; TLR: Toll-like receptor; TGF: Transforming growth factor; CXCL: C-X-C motif chemokine ligand; CCL: C-C motif chemokine ligand; TNF: Tumor necrosis factor; VEGF: Vascular endothelial growth factor; Arg-1: Arginase-1.
