Oesophageal cancer in Africa.
D000349:Africa; D000434:Alcoholic Beverages / Q000009:adverse effects; D004938:Esophageal Neoplasms / Q000139:chemically induced / Q000453:epidemiology*; D006801:Humans; D008670:Metals / Q000009:adverse effects; D009602:Nitrosamines / Q000009:adverse effects
D008670:Metals; D009602:Nitrosamines