Recent changes in the prevalence of cigarette smoking in Scotland.
D000293:Adolescent; D000328:Adult; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012606:Scotland; D012907:Smoking / Q000453:epidemiology*; D012959:Socioeconomic Factors; D014852:Wales