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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/).
Effect of factors (PLGA, PF-127 and chitosan) on the particle size of chitosan-coated PLGA nanoparticles. The blue points represent the insignificant factors, and the red points represent significant factors.