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Men, for example, admit to littering butts more than women and yet observational studies show the genders are equal opportunity scofflaws when it comes to pitching their butts into drains, gutters or sewers

That effort took him 40 hours in the sweltering Brisbane summer

However, inspection of the covariates adjusted for in each study failed to reveal a systematic effect (i.e., the studies with more comprehensive covariate adjustment did not necessarily show reductions in OR estimates from unadjusted to adjusted models)

By the early 1970s, Marlboro had achieved the distinction of being the best-selling cigarette in the United States