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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 (http://creativecommons.org/licenses/by/4.0/).
Characterization of PRN-loaded MN applied to ex vivo porcine ear skin. Optical image of (A) PRN-loaded MN patch before application and (B) PRN-loaded MN patch after application.