A study of esophageal cancer in the Transkei.
D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000368:Aged; D044383:Black People; D003677:Deficiency Diseases; D004777:Environment; D004938:Esophageal Neoplasms / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D007501:Iron; D008297:Male; D008875:Middle Aged; D008982:Molybdenum; D009602:Nitrosamines; D012723:Sex; D013019:South Africa; D000096702:Aflatoxin Poisoning
D007501:Iron; D008982:Molybdenum; D009602:Nitrosamines