A value of (*) P < 0.05 was considered significant and a value of (**) P < 0.01 was considered highly significant. 3 Results 3.1 Preparation of PDA NPs and loading of GFs on PDA NPs PDA NPs were obtained by oxidative polymerization of DA monomers ( Fig. 1 a).
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A 3D-Bioprinted dual growth factor-releasing intervertebral disc scaffold induces nucleus pulposus and annulus fibrosus reconstruction.
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