title: [Etiological considerations of peptic ulcer and their changes].
mesh_terms: D005753:Gastric Mucosa / Q000098:blood supply / Q000473:pathology; D006801:Humans; D010437:Peptic Ulcer / Q000209:etiology*; D013276:Stomach Ulcer / Q000473:pathology; D013315:Stress, Psychological