From the Centers for Disease Control. Cigarette smoking among youth--1989.
D000293:Adolescent; D000294:Adolescent Behavior; D002648:Child; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology* / Q000208:ethnology; D014481:United States / Q000453:epidemiology