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Overview of IBA1 positive macrophages during the development of human inner ear. (A) Macrophages are present around the spiral ganglion and the A’: mesenchymal tissue at GW09. (B) at GW13 (C0 and at GW17. Macrophages can see along the bony structure around the inner ear (Arrow and C’). Observations of amoeboid and transitional forms of IBA1 positive cells. (Inlets of A–C upper right).
