title: Geographical aspects of peptic ulcer surgery. Invited commentary.
mesh_terms: D004032:Diet / Q000009:adverse effects; D004380:Duodenal Obstruction / Q000209:etiology; D004381:Duodenal Ulcer / Q000150:complications / Q000209:etiology / Q000601:surgery; D006801:Humans; D009549:Nigeria; D010437:Peptic Ulcer / Q000209:etiology / Q000601:surgery*; D011446:Prospective Studies; D011708:Pylorus / Q000601:surgery; D013276:Stomach Ulcer / Q000209:etiology / Q000601:surgery; D014628:Vagotomy