Oral leukoplakia.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001114:Areca; D005260:Female; D006801:Humans; D007194:India; D007972:Leukoplakia, Oral / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000209:etiology; D010946:Plants, Medicinal; D010947:Plants, Toxic; D011230:Precancerous Conditions; D012737:Sex Factors; D012907:Smoking / Q000150:complications; D014026:Nicotiana