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. 2017 Mar 8;7:43924. doi: 10.1038/srep43924

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(a) Digital photographs of drug-loaded samples with grid pore size 200 × 200 μm². (b) SEM images of drug-loaded samples with grid pore size 200 × 200 μm². (c) Digital photographs of drug-loaded samples with grid pore size 500 × 500 μm². (d) SEM images of drug-loaded samples with grid pore size 500 × 500 μm².