We verified the final models for error specification, normality, homoscedasticity, multicollinearity, outliers and self-correlation, and all diagnostics showed that the chosen models fulfilled the assumption [see Additional file 1] Discussion This is the first study on smoking behavior in a Spanish adult population using both a questionnaire and a biomarker of tobacco exposure
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Some scientific journals publish tobacco industry-funded research when they consider it worthy, while others, such as the American Journal of Public Health, do not, having concluded that the tobacco industrys longtime efforts to distort science show that the companies cannot be trusted
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Impact on Daily Function Cognitive impairment and fatigue can affect concentration, memory, and other brain functions needed for daily tasks
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