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Blood vessel formation of different PEEK samples. (A) Pictures of HUVECs angiogenesis assay and vivo CAM assay; the number of intersections of the neovessel network: (B) HUVECs and (C) CAM; *p < 0.05, **p < 0.01, and ***p < 0.001 (Xiao et al., 2021). Copyright 2021, American Chemical Society.
