title: [Pathophysiology of peptic ulcer: changes in serum secretin concentrations and the number of secretin cells in the duodenal mucosa].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000473:pathology / Q000503:physiopathology*; D004386:Duodenum / Q000473:pathology*; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012633:Secretin / Q000097:blood / Q000378:metabolism*; D013276:Stomach Ulcer / Q000473:pathology / Q000503:physiopathology*
chemical_list: D012633:Secretin