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Cytotoxicity studies of CUBPLPs films and degradation products. (A) 3T3 fibroblast cells were cultured on CUBPLPs films at different time points; (B) 3T3 fibroblast cells were cultured with UBPLPs and CUBPLPs degradation products for 24h. PLGA films and degradation products were used as controls.
