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Weight loss ratio of P, PR, PT and PRT scaffolds degraded in vitro. (P: poly(d,l-lactic acid); PR: poly(d,l-lactic acid)/RGD peptide modification of poly{(lactic acid)-co-[(glycolic acid) -alt-(L-lysine)]}; PT: poly(d,l-lactic acid)/β-tricalcium phosphate; PRT: poly(d,l-lactic acid)/RGD peptide modification of poly{(lactic acid)-co-[(glycolic acid) -alt-(l-lysine)]}/β-tricalcium phosphate).
