Norway, from Flags of All Nations, Series 1 (N9) for Allen & Ginter Cigarettes Brands, 1887 Captions are provided by our contributors
We break exact linear dependency between the three explanatory variables (i.e., cohort = period age) and deal with under-identification by grouping birth cohorts into frequently used 5-year intervals, and, after confirmation of a curvilinear relationship, treat smoking as a quadratic function of age 30
Eliminating Tobacco-Related Disease and Death: Addressing DisparitiesA Report of the Surgeon General
Among the cross-sectional studies, three studies did not find any significant association of ever vaping with a prevalence of non-melanoma skin cancer 19 , bladder cancer 16 , and any cancer 14 , respectively
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