What brands are US smokers under 25 choosing?
O'Connor
R J
RJ
D000293:Adolescent; D000328:Adult; D002648:Child; D002755:Choice Behavior; D006801:Humans; D040541:Marketing; D012907:Smoking / Q000523:psychology*; D019460:Tobacco Industry / Q000706:statistics & numerical data*; D014481:United States