Tobacco chewing and snuff dipping: an association with human cancer.
D001208:Asia; D006801:Humans; D009062:Mouth Neoplasms / Q000453:epidemiology / Q000209:etiology*; D010610:Pharyngeal Neoplasms / Q000453:epidemiology / Q000209:etiology*; D014030:Tobacco, Smokeless; D014481:United States