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. 2021 Feb 11;9:598717. doi: 10.3389/fcell.2021.598717

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Copyright © 2021 Karisma, Wu, Lei, Liu, Nisar, Lloyd, Pourzand and Zhong.

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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Schematic diagram of photo-protection by UVA-induced drug release on the skin. (A) Nanoparticles remain on stratum corneum before sun exposure; (B) Nanoparticles release the drug after sun exposure.