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These hospitals serve as the academic medical center of the University of California, San Francisco, which is world-renowned for its graduate-level health sciences education and biomedical research

The study shows that nicotine and other compounds directly affect sperm production and maturation through oxidative stress and DNA damage mechanisms

Selby P, Zawertailo L

The risks of smoking lie primarily in its combustion products

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This literature is a bit convoluted because of differing definitions of who is a smoker, so before we take any strong stances about the harm-reduction potential of e-cigarettes, we should do a deeper dive into the literature on youth smoking and e-smoking rates