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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/).
Representative Abbott curve illustrating the three created zones: the peak region, the core region and the valley region and the calculation of the corresponding functional volume parameters Vmp, Vmc, Vvc and Vvv.