title: [Survey of oral leukoplakia in those addicted to betelnuts on the Hainan Island].
mesh_terms: D000328:Adult; D000368:Aged; D001114:Areca; D002681:China; D005260:Female; D006801:Humans; D007972:Leukoplakia, Oral / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009754:Nuts / Q000009:adverse effects; D010946:Plants, Medicinal; D012907:Smoking; D019966:Substance-Related Disorders