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. 2021 Feb 28;10(3):178. doi: 10.3390/biology10030178

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© 2021 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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General intelligence score (GIS) according to decayed teeth as a dichotomized variable. General intelligence score (GIS), CA = presence of at least one decayed tooth; None-CA = decayed teeth were not detected on clinical examination.