"The assumption being that if high-risk children could be made to 'feel good about themselves,' these epidemics could be mitigated. ... This prescription, unfortunately, has proven to be yet another in a long list of nouveau homilies that haven't lived up to their promises."

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The risk of developing carcinoma of the lung increases steadily as the amount smoked increases. If the risk among non-smokers is taken as unity and the resulting ratios in the three age groups in which a large number of patients were interviewed (ages 45 to 74) are averaged, the relative risks become 6, 19, 26, 49, and 65 when the number of cigarettes smoked a day are 3, 10, 20, 35, and, say, 60-that is, the mid-points of each smoking group. In other words, on the admittedly speculative assumptions we have made, the risk seems to vary in approximately simple proportion with the amount smoked.

— Richard Doll