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The conclusions are based on a synthesis of: clinical data (biomarkers in humans showing DNA damage, oxidative stress, and #inflammation), animal studies (including lung #tumor development in mice), laboratory research (cellular damage and disrupted biological pathways)

Performances in endurance sports have been shrouded in controversy for the past 30 years because many athletes, intent on winning races and achieving faster times, have turned to banned performance-enhancing drugs

Specifically, adults born in the 1950 s, 1960 s, and 1970 s had the highest likelihood of smoking, while the three oldest (1899, 1904, 1909) birth cohorts, as well as the most recent (1999) birth cohort, showed the lowest probability of cigarette use

Our evidence suggested that a 100 percent increase in the tax would reduce smoking by at most 3 or 5 percent