This evidence is further supported by studies of second-hand smoke in never smokers,81828384 in the same way as for coronary heart disease.1283 In a meta-analysis of seven studies of never-smokers,82 the relative risks for developing stroke associated with second-hand smoke, compared with unexposed never smokers, were 1.35 (95% confidence interval 1.22 to 1.50) in all participants, 1.40 (1.09 to 1.81) among men, and 1.43 (1.28 to 1.61) among women, consistent with our results for actively smoking one cigarette per day
John Wirtz, an advertising professor at the University of Illinois, studies how ads impact our behavior
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doi: 10.1186/1476-069X-13-55
In 2006, they began to spread to the United States and Europe, marking the start of a growing global market