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A: transmission electron micrograph of lyophilized 50:50 poly(lactic-co-glycolic acid) (PLGA) VEGF encapsulated nanoparticles (VEGF-NPs). Inset: higher-magnification image. Scale bar = 1 μm. B: release kinetics of 50:50 PLGA VEGF-NPs. By 4 days, 89% was released. Values are means ± SE; n = 4.
