Gastroenterology in the aged.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001660:Biliary Tract Diseases / Q000175:diagnosis; D004032:Diet; D004378:Duodenal Diseases / Q000175:diagnosis; D004935:Esophageal Diseases / Q000175:diagnosis; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D008107:Liver Diseases / Q000175:diagnosis; D008875:Middle Aged; D009747:Nutritional Physiological Phenomena; D010182:Pancreatic Diseases / Q000175:diagnosis