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Canadian researchers examined 1,231 patients--with the average age of 62--at London's Health Sciences Centre's University Hospital and surveyed them to find out how many egg yolks they'd eaten in their lives, and how many packs of cigarettes they'd smoked

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[DOI] [PMC free article] [PubMed] [Google Scholar] 23.Stepanov I, Feuer R, Jensen J, Hatsukami D, Hecht SS

In the context of the dogs in the study, those that developed cancer were exposed to an equivalent of 10 pack-years of smoke, meaning their exposure was akin to being around smoke from 10 packs of cigarettes per day for one year

In this study, we aimed to further investigate the role of early age at smoking initiation on the risk of cardiovascular diseases