title: Epidemiology of gastrointestinal tumours: a review.
mesh_terms: D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000209:etiology; D005006:Ethnicity; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology* / Q000209:etiology; D006801:Humans