Bile RefluxDuodenogastric RefluxGastroesophageal RefluxBileBile Acids and SaltsInflammationPostgastrectomy SyndromesGastritisBarrett EsophagusEsophagusVesico-Ureteral RefluxAnastomosis, Roux-en-YBiliary Tract DiseasesManometryBile DuctsStomachGastric JuiceGastric MucosaEsophagitis, PepticPyloric AntrumMetaplasiaHelicobacter pyloriLaryngopharyngeal RefluxDyspepsiaBilirubinHelicobacter InfectionsInflammation MediatorsEsophageal pH Monitoring