[Epidemiological investigation of gastrointestinal cancer].
D000328:Adult; D000368:Aged; D004812:Epidemiologic Methods; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D008297:Male; D008800:Mexico; D008875:Middle Aged
Investigación epidemiológica del carcinoma gástrico.