The role of geographical pathology in cancer research.
D000349:Africa; D002051:Burkitt Lymphoma / Q000453:epidemiology; D002648:Child; D004777:Environment; D004938:Esophageal Neoplasms / Q000453:epidemiology; D005060:Europe; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology; D006801:Humans; D008113:Liver Neoplasms / Q000453:epidemiology; D009369:Neoplasms / Q000453:epidemiology*; D012106:Research; D013020:South America; D014481:United States