title: Letter: Alkali and acid ingestion.
mesh_terms: D000143:Acids / Q000009:adverse effects*; D000468:Alkalies / Q000009:adverse effects*; D000818:Animals; D004285:Dogs; D004940:Esophageal Stenosis / Q000139:chemically induced* / Q000000981:diagnostic imaging / Q000473:pathology; D004947:Esophagus / Q000473:pathology; D006801:Humans; D011859:Radiography; D012972:Sodium Hydroxide / Q000633:toxicity; D013272:Stomach Diseases / Q000139:chemically induced*
chemical_list: D000143:Acids; D000468:Alkalies; D012972:Sodium Hydroxide