title: Gastric secretion over the years.
mesh_terms: D001789:Blood Group Antigens; D002784:Cholesterol / Q000097:blood; D004381:Duodenal Ulcer / Q000209:etiology; D005500:Follow-Up Studies; D005750:Gastric Juice / Q000378:metabolism*; D006801:Humans; D012636:Secretory Rate; D012907:Smoking
chemical_list: D001789:Blood Group Antigens; D002784:Cholesterol