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There has been little change in the prevalence of smoking since the previous year (32% were current smokers in 2001 and 35% in 2000)

To compare nicotine levels, repeated measures analysis of variance (ANOVA) was used, with 6 timing levels as within-subject variable and two groups (smokers vs

Tingum, E

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Levels such as these resulted in benzene being named by the 2002 National-Scale Air Toxics Assessment (NATA) as the largest single known cancer-risk air toxic in the U.S.[24]

In 1903, Austrian chemist Carl Auer von Welsbach made a hand-held lighter with a striking wheel