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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/).
Exploratory multivariate analysis on biological activities of Achillea species. (A) Score plots of principal component analysis; (B) Clustered Image Map (Red color: High activity, Blue color: low activity.