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(A) Effect of PM2.5 on VEGF-induced angiogenesis in vivo. (B) Hemoglobin content and (C) angiogenesis of Matrigel plugs was determined. Magnification, ×10. *P<0.05 vs. control group (0 µg/ml PM2.5). PM2.5, particulate matter with a diameter of ≤2.5 µm; VEGF, vascular endothelial growth factor.
