title: Cigarette smoking and oral leukoplakia in healthy males.
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D006801:Humans; D007972:Leukoplakia, Oral / Q000209:etiology*; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D012907:Smoking