title: Epidemiological study of precancerous lesions of the oral cavity: a preliminary report.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D004777:Environment; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008409:Mastication; D008875:Middle Aged; D009059:Mouth Diseases / Q000453:epidemiology* / Q000209:etiology; D010608:Pharyngeal Diseases / Q000453:epidemiology; D010947:Plants, Toxic; D011230:Precancerous Conditions / Q000453:epidemiology* / Q000209:etiology; D012737:Sex Factors; D012907:Smoking; D012959:Socioeconomic Factors; D014026:Nicotiana