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Cell growth and proliferation on PLGA/vanillin films. (A) The cell viability assay at days 1 and 3. Data presented are means±SD from three different experiments. ***P<0.001. (B) Representative SEM images of cells cultured on PLGA/vanillin films (A: 0 wt%; B: 1 wt%; C: 5 wt%; D: 10 wt%).
