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Biocompatible hybrid hollow spheres of calcium carbonate/folate with both mesopores and macropores were synthesized using a facile green approach based on Ostwald ripening. The porous hollow spheres were efficiently loaded with doxorubicin, which they were then able to release in a pH-responsive and sustained manner for the targeted treatment of human cancer cells.
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Guo et al. (2016) studied this question.
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