From the Centers for Disease Control and Prevention. Cigarette smoking among adults--United States, 1993.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology* / Q000208:ethnology; D016540:Smoking Cessation / Q000208:ethnology / Q000706:statistics & numerical data*; D012959:Socioeconomic Factors; D014481:United States / Q000453:epidemiology