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Open AccessHow Can We Measure Alcohol Outlet Density Around Schools? A Comparison Between Two Buffer-Based Methods
Measuring the density of alcohol outlets around schools is a critical step towards understanding the drivers of drinking among adolescents. Different methodologies have been used in the literature for this pur...
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Open AccessImpact of a long-term tobacco-free policy at a comprehensive cancer center: a series of cross-sectional surveys
Spain has passed two smoke-free laws in the last years. In 2005, the law banned smoking in indoor places, and in 2010 the ban was extended to outdoor areas of certain premises such as hospitals. This study ass...
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Handwritten versus scanned signature on the invitation letter: does it make any difference in participation in a population-based study?