title: Antral activity and symptom periodicity in duodenal ulceration.
mesh_terms: D004381:Duodenal Ulcer / Q000503:physiopathology*; D005260:Female; D005502:Food; D005750:Gastric Juice / Q000502:physiology; D006632:Histamine / Q000494:pharmacology; D006634:Histamine H1 Antagonists / Q000494:pharmacology; D006801:Humans; D008297:Male; D012636:Secretory Rate; D013270:Stomach / Q000187:drug effects / Q000502:physiology / Q000503:physiopathology*
chemical_list: D006634:Histamine H1 Antagonists; D006632:Histamine