Fig. 5From: In vitro immunological and biological evaluations of the angiogenic potential of platelet-rich fibrin preparations: a standardized comparison with PRP preparationsThe dose-dependent effects of PRP (a) and PRFext preparations (b) on phosphorylation of VEGFR2 in HUVEC at 10 min. Similar data were obtained from three additional independent experiments (n = 4)Back to article page