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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/).
Flow chart of the generalized linear mixed model used to assess the relationship between smoking indicators and DNA methylation phenotypic age (DNAmPhenoAge) acceleration of participants in the Veterans Affairs Normative Aging Study in Boston, MA, 1999–2013.