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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/).
Response 3D plots (A–C) and cube plot (D) for the effect of Span® 85 concentration (X1), Hydration time (X2), and hydrating buffer pH (X3) on the vesicle size of FLB niosomes.