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(A) Immunohistological images of F4/80 staining and (B) the number of F4/80 positive cells per HPF (×400). The macrophage infiltration into the tissue-engineered vascular graft in the unseeded control and 0.1 × 106 group significantly increased compare to the 1 × 106 and 10 × 106 groups (159.05 ± 11.59 and 159.17 ± 16.64 vs 122.02 ± 14.76 and 120.68 ± 22.91 cells/HPF; ****p < 0.0001).
HPF: High power field.
