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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 (https://creativecommons.org/licenses/by/4.0/).
The penetration depth profiles of verum and placebo creams into porcine ear skin obtained after (a) 2 and (b) 4 h penetration time using CRM compared to untreated skin.