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Cumulative in vitro release study. (a) Cumulative in vitro release study tobramycin sulphate loaded polymeric nanoparticles of formulation F1 to F6. (b) Cumulative in vitro release study tobramycin sulphate loaded polymeric nanoparticles of formulation F7 to F13. (A higher resolution / colour version of this figure is available in the electronic copy of the article).
