title: Gastric secretion over the years.
mesh_terms: D004381:Duodenal Ulcer / Q000097:blood / Q000209:etiology; D005750:Gastric Juice / Q000378:metabolism*; D006801:Humans; D008297:Male; D010435:Pepsinogens / Q000097:blood; D012636:Secretory Rate; D013276:Stomach Ulcer / Q000209:etiology
chemical_list: D010435:Pepsinogens