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Suter et al., 2010), can damage DNA by causing double-stranded breaks, as shown in mouse embryonic stem cells exposed to cigarette-smoke condensate (Mortusewicz et al., 2005), which methylates CpGs adjacent to the repaired nucleotides ( nicotine effects on gene expression (Lee and DAlonzo, 1993)

Scientists have long recognized that people who use alcohol, tobacco, marijuana and other drugs while adolescents are far more likely to use more dangerous drugs in their 30s and 40s

This uncertainty and lack of knowledge among some may create opportunities for tobacco companies to shape the publics perception

Youre actually less likely to quit if you take up e-cigarettes, says Stanton Glantz, director of the University of California, San Francisco Center for Tobacco Control Research and Education