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A Canadian analysis found that where a person lived was more significant of a factor in gene expression than their heritage.
Among the reasons: American teens are 82 times more likely to die from gun violence than their peers in other prosperous countries.
A study of interest in heat-not-burn tobacco shows a potentially large international market for the smoking devices, which remain largely unregulated.
A 15-country study examines how gender stereotypes affect the sexual, reproductive, and mental health of young people.
