Levels of intragastric and intraduodenal acidity.
D004386:Duodenum; D005750:Gastric Juice; D006801:Humans; D007419:Intestinal Secretions; D010437:Peptic Ulcer / Q000502:physiology*; D013270:Stomach
DUODENAL JUICE; GASTRIC JUICE; PEPTIC ULCER/physiology; STOMACH