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. 2022 Dec 23;14(1):12. doi: 10.3390/jfb14010012

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Structure illustration of PEG-PEI.NHAc-DTPA(Gd) and T₁-weighted MR imaging in vivo. Reproduced with permission of [187]. Copyright 2014, American Chemical Society.