Some observations on the etiology of oral cancer.
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008409:Mastication; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000453:epidemiology / Q000209:etiology*; D010947:Plants, Toxic; D012907:Smoking / Q000150:complications; D014026:Nicotiana