Introduction: The catch-up effect is a phenomenon in which the tobacco-use prevalence rates of White individuals are initially greater than the rates of Black individuals, but by the time the youth...

中文翻译：

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混血儿黑人青年是否存在香烟追赶效应？

简介：追赶效应是一种现象，在这种现象中，白人的烟草使用流行率最初高于黑人，但到了青年时期……