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. 2020 Dec 12;9(12):1855. doi: 10.3390/foods9121855

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© 2020 by the authors.

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/).

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Observed vs. predicted values for carbon, oxygen and hydrogen isotopic composition in two harvest years (2016 and 2017) calculated by multiple linear regression (MLR) using geoclimatic parameters of VOO producer areas as predictors. (a,b) plots of δ¹³C from 2016 and 2017; (c,d) plots of δ¹⁸O from 2016 and 2017; (e,f) plots of δ²H from 2016 and 2017.