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Oral health, including enamel damage, gingivitis, and periodontal disease

This portion of the model specifies how much of the variation in smoking is due to changing social environments that influence the probability of smoking for all individuals concurrently (i.e., period effect) or changing population composition attributable to collective event experience such as being born in the same year (i.e., cohort effect)

How an outsider, once ignored by the public-health establishment, became the most powerful man in science This article was featured in the One Story to Read Today newsletter

Regular Battery: Typically designed to discharge only a small percentage (about 2-5%) of its capacity