Health

Tobacco linked to 40 percent of US cancers

Tobacco use remains the most preventable cause of cancer, and 40 percent of diagnosed US cancer cases may have a link to its use, health authorities said Thursday.

Cardiology

Smoking leaves lasting marks on DNA, study finds

(HealthDay)—Smoking cigarettes can leave a lasting imprint on human DNA, altering more than 7,000 genes in ways that may contribute to the development of smoking-related diseases, a new study says.

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