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. 2022 Jan 24;9:834171. doi: 10.3389/fchem.2021.834171

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Copyright © 2022 Zhao, Zhang, Wu and Xu.

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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(A) The schematic illustration of the fabrication of Fe₃O₄@MOF core–shell composites. (B) T2-weighted MR images and T2-MR signals of tumor on HeLa-tumor bearing mice before injection, 1 and 9 h post injection of Fe₃O₄@UiO-66 intravenously (tumor region marked by red cycles). (C) MRI of HeLa-tumor bearing mice treated with PBS or Fe₃O₄@UiO-66-DOX collected at different time points (tumor region marked by red cycles). Source: (Zhao et al., 2016a).