title: Geographic pathology of the gastrointestinal tract. Preface.
mesh_terms: D000349:Africa; D005060:Europe; D005767:Gastrointestinal Diseases / Q000453:epidemiology*; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology*; D006801:Humans; D007557:Israel; D013020:South America