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The cumulative cisplatin release percentage versus time for the A1 (0.25% w/v PEG concentration, room temperature), A2 (0.25% w/v PEG concentration, 65 °C), A3 (1.0% w/v PEG concentration, room temperature), and A4 (1.0% w/v PEG concentration, 65 °C) batches synthesized using an anionic polymerization technique at different time intervals. The results are expressed as mean ± 5% values from three independent experiments.
