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Plots showing the associations between short-term exposure to PM10 and the methylation of CRY2 and PER2 genes from day 0 to day −6. Methylation values are provided as percentage changes (% changes) in methylation associated with 10-µg/m3 increments, estimated by multivariable regression models adjusted for age, BMI, smoking habits, percentage of lymphocytes, Pyrosequencing run, CpG site, season, temperature, and humidity.
