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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/).
Representation of samples treated with human sera in three components obtained by PCA analysis. Colors indicate (A) treatments; (B) group of cornea-HAM (human amniotic membrane). Samples were classified mainly by cornea-HAM and not by treatment.