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The inflammatory cell infiltration in rat model on day 3 after in-situ bioprinting (A) Immunofluorescent staining for infiltrating inflammatory cells. Scale bar: 30 μm; Data are expressed as the mean ± SEM; n = 3; ∗P < 0.05; ∗∗P < 0.01; ∗∗∗P < 0.001; ∗∗∗∗P < 0.0001. (B) Immunohistochemical staining of iNOS and ARG-1 to determine the polarization of macrophages on day 3. Scale bar: 50 μm.
