Tobacco or health.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005006:Ethnicity; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D044469:Racial Groups; D012907:Smoking / Q000453:epidemiology* / Q000639:trends; D012959:Socioeconomic Factors; D014481:United States / Q000453:epidemiology