title: A review of factors associated with cancer of the esophagus in Transkei.
mesh_terms: D000353:Africa, Southern; D002274:Carcinogens, Environmental; D004032:Diet; D004812:Epidemiologic Methods; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors
chemical_list: D002274:Carcinogens, Environmental