National trends in substance use and use disorders among youth

This analysis will examine the overlap of marijuana, tobacco and alcohol use among youth in the US. DuPont had requested this analysis, Han rightly suggested an...本分析将对美国青少年大麻（marijuana）、烟草（tobacco）与酒精（alcohol）使用行为的重叠情况展开考察。杜邦（DuPont）委托开展本次分析，韩（Han）合理地提出了……