title: Letter: gastric acid and duodenogastric reflux.
mesh_terms: D001639:Bicarbonates / Q000032:analysis; D001646:Bile; D001647:Bile Acids and Salts / Q000032:analysis; D004378:Duodenal Diseases; D004386:Duodenum / Q000378:metabolism; D005745:Gastric Acidity Determination; D005750:Gastric Juice / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007328:Insulin; D007419:Intestinal Secretions / Q000032:analysis; D010189:Pancreatic Juice / Q000032:analysis; D012964:Sodium / Q000032:analysis
chemical_list: D001639:Bicarbonates; D001647:Bile Acids and Salts; D007328:Insulin; D012964:Sodium