Epidemiology and ecology of gastric cancer in Costa Rica.
D000328:Adult; D000367:Age Factors; D000368:Aged; D003364:Costa Rica; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008903:Minerals / Q000032:analysis; D012737:Sex Factors; D012987:Soil / Q000032:analysis; D013274:Stomach Neoplasms / Q000453:epidemiology*
D008903:Minerals; D012987:Soil