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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/).
Predicted vs. observed plots for the top four performing meta-analysis equations M5 (CH4d), M6 (CH4d), M11 (CH4i) and M12 (CH4i), as evaluated on the evaluation dataset (n = 107).