title: Levels of gastric pepsin secretion in relation to the clinical course of duodenal ulcer.
mesh_terms: D000328:Adult; D004381:Duodenal Ulcer / Q000378:metabolism*; D005745:Gastric Acidity Determination; D005753:Gastric Mucosa / Q000378:metabolism*; D006801:Humans; D008875:Middle Aged; D010434:Pepsin A / Q000378:metabolism*
chemical_list: D010434:Pepsin A