Smokeless tobacco and oral carcinoma: a review of the literature.
D002277:Carcinoma / Q000209:etiology; D006801:Humans; D007972:Leukoplakia, Oral / Q000209:etiology; D009062:Mouth Neoplasms / Q000209:etiology*; D010947:Plants, Toxic; D011230:Precancerous Conditions / Q000209:etiology; D014026:Nicotiana