Pattern of clues: evidence of distinct DNA methylation in newborns of smoking women.

To study the roots of these associations, a team of investigators assessed DNA methylation across more than 470,000 cytosine–guanine dinucleotide (CpG) sites in cord blood samples and found a highly significant association between maternal smoking and methylation [ EHP 120(10):1425–1431; Joubert et al.].

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