From the Centers for Disease Control and Prevention. Tobacco use among middle and high school students--United States, 1999.
D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology*; D013334:Students / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology