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The morphology of A nHA-PA66 scaffolds, B PRP-gel/nHAPA66, C HUMSCs/nHA-PA66 and D HUMSCs-PRP-gel/nHAPA66. The yellow areas represent the fibrin network formed by PRP gel. The green areas represent the stem cells adhered to the scaffolds. E The porosity of the scaffolds from the four groups. (Data in mean ± SD, n = 5)
