title: Endoscopic chemodiagnosis. Improvement in the recognition of upper gastrointestinal disorders.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003224:Congo Red; D004724:Endoscopy; D005260:Female; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010635:Phenolphthaleins; D010637:Phenolsulfonphthalein
chemical_list: D010635:Phenolphthaleins; D003224:Congo Red; D010637:Phenolsulfonphthalein