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. 2022 Feb 15;10:837032. doi: 10.3389/fchem.2022.837032

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Copyright © 2022 Li, Guo, Zhang, Li and Hao.

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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SCHEME 1 — Illustration of the preparation of Gd³⁺-incorporated mesoporous silica nanoparticles (MSN) (Gd₂O₃@MSN) particles for magnetic resonance imaging.