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. 2021 Oct 15;12:744811. doi: 10.3389/fphar.2021.744811

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Copyright © 2021 Liu, Wang, He and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Cellular uptake and intracellular DOX release of (A) free DOX, (B) mNPs/DOX, and (C) STP-mNPs/DOX after incubation with CT26 cells for 2 h detected by CLSM. Scale bars = 20 μm.