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Prevention Science , 15 (1), 5664

Another possible mechanism is that smoking can cause epigenetic changes as evident by the changes in the DNA methylation level in patients who continued smoking

Learn more about the effects of smoking on the body and brain

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When it comes to live theater, as Alva No writes in NPR, the audience too is performing, and that the audience too is on display, noting the audience is uncomfortable and under pressure not to cough, making coughing all the more likely