Geographical variation in cancer incidence: a clue to causation.
D000349:Africa; D000368:Aged; D002051:Burkitt Lymphoma / Q000453:epidemiology; D002648:Child; D002681:China; D003110:Colonic Neoplasms / Q000453:epidemiology / Q000209:etiology; D004032:Diet / Q000009:adverse effects; D004938:Esophageal Neoplasms / Q000453:epidemiology; D005060:Europe; D005260:Female; D006801:Humans; D007492:Iran; D008019:Life Style; D008297:Male; D008460:Meat; D009369:Neoplasms / Q000453:epidemiology* / Q000209:etiology; D012800:Siberia