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Cell culture in porous PLGA/vanillin scaffolds. (A) Representative SEM images of porous PLGA and PLGA/vanillin scaffolds (top panel: ×50 magnification, bottom panel: ×200 magnification). (B) Representative SEM images of annulus fibrous (AF) cell-seeded PLGA and PLGA/vanillin scaffolds. (C) The cell viability assay of cell-seeded scaffolds. *P<0.05, **P<0.01, ***P<0.001. Values shown are means±S.D (n=3).
