Ursodeoxycholic AcidBile RefluxCholagogues and CholereticsBile Acids and SaltsDeoxycholic AcidBileChenodeoxycholic AcidTretinoinDuodenogastric RefluxLithocholic AcidGastroesophageal RefluxLiver Cirrhosis, BiliaryPostgastrectomy SyndromesCholelithiasisTaurochenodeoxycholic AcidCholic AcidsCholestasis, IntrahepaticCholic AcidCholestasisBile DuctsGastritisCholangitis, SclerosingBilirubinDehydrocholic AcidBarrett EsophagusSelenium RadioisotopesEsophagusVesico-Ureteral RefluxAnastomosis, Roux-en-YGlycochenodeoxycholic AcidPortoenterostomy, HepaticBiliary Tract DiseasesManometryGlycocholic AcidBile CanaliculiStomachHepatitis, AutoimmuneGastric JuiceTaurineTaurocholic AcidGlycodeoxycholic AcidLiver Function TestsLiverCholesterolPruritusEsophagitis, PepticGastric MucosaCholecystographyGallbladderHepatic InsufficiencyGallstonesBiliary TractPyloric AntrumBiliary AtresiaHydroxysteroid DehydrogenasesSulfuric AcidsMetaplasiaEubacteriumLaryngopharyngeal RefluxDyspepsiaXanthomatosis, CerebrotendinousAzoxymethaneGas Chromatography-Mass SpectrometryPhenolphthaleinHelicobacter pyloriChromatography, Gas