This helps to determine if someone has been around cigarette smoke, even if they didnt admit to smoking
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
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My grown daughters regarded him with the same affection which they had shown him as children
When inhaled, they penetrate deep into the lungs, causing inflammation and cellular damage