"The conclusions, published in the journal Critical Public Health (De Vogli, Kouvonen & Gimeno, 2011), are clear: the density of Subway's outlets is positively associated with the prevalence of obesity across 26 advanced economies in both men and women. Even after adjusting for the other factors, countries with the highest density of Subway restaurants (such as the United States and Canada) have a higher prevalence of obesity than countries with a low density (like Norway and Japan)."
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