Duodenogastric RefluxBile RefluxTechnetium Tc 99m LidofeninGastroesophageal RefluxImino AcidsGastric JuiceTrimebutinePylorusBile Acids and SaltsBileTechnetium Tc 99m DisofeninTechnetium Tc 99m Diethyl-iminodiacetic AcidStomachDuodenal DiseasesGastric EmptyingPostgastrectomy SyndromesVesico-Ureteral RefluxPyloric AntrumCisaprideDuodenumVagotomy, TruncalEndoscopy, GastrointestinalEsophagusGastritisGastric MucosaBarrett EsophagusStomach DiseasesGastric AcidGastrointestinal AgentsEsophagitis, PepticManometryOrganotechnetium CompoundsAnastomosis, Roux-en-YStomach UlcerLaryngopharyngeal RefluxGastrointestinal MotilityBiliary Tract DiseasesCholecystectomyBile DuctsEsophageal pH MonitoringJejunumHydrogen-Ion ConcentrationTechnetiumFastingHeartburnEsophagitisVenous Insufficiency