title: Letter: Pain in gastric ulcer.
mesh_terms: D006851:Hydrochloric Acid / Q000008:administration & dosage / Q000494:pharmacology; D010146:Pain / Q000209:etiology*; D013270:Stomach / Q000187:drug effects; D013276:Stomach Ulcer / Q000150:complications*
chemical_list: D006851:Hydrochloric Acid