title: Gastrointestinal cancer: genetics and genetic markers.
mesh_terms: D000328:Adult; D000368:Aged; D004739:England; D004777:Environment; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology / Q000235:genetics*; D005799:Genes, Dominant; D006801:Humans; D008875:Middle Aged; D012306:Risk