Bile RefluxDuodenogastric RefluxGastroesophageal RefluxBileNauseaBile Acids and SaltsPostgastrectomy SyndromesGastritisBarrett EsophagusEsophagusVesico-Ureteral RefluxAnastomosis, Roux-en-YPostoperative Nausea and VomitingBiliary Tract DiseasesManometryBile DuctsStomachGastric JuiceEsophagitis, PepticGastric MucosaPyloric AntrumVomitingAntiemeticsDyspepsiaMetaplasiaLaryngopharyngeal RefluxHelicobacter pyloriBilirubinHelicobacter InfectionsEsophageal pH Monitoring