Bile RefluxGastritisDuodenogastric RefluxPostgastrectomy SyndromesGastroesophageal RefluxGastritis, AtrophicGastroenterostomyAnastomosis, Roux-en-YStomachPyloric AntrumGastric JuiceBiliary Tract DiseasesGastric EmptyingHelicobacter pyloriVesico-Ureteral RefluxVagotomyHelicobacter InfectionsEndoscopy, GastrointestinalGastric MucosaGallbladderBile DuctsEsophagitis, PepticBiopsyEsophagusGastroscopyMetaplasiaGastritis, HypertrophicLaryngopharyngeal RefluxPostoperative ComplicationsEsophagitisPepsinogen AEsophageal pH MonitoringStomach NeoplasmsAchlorhydriaHeartburnManometryGastric Acidity DeterminationProton Pump InhibitorsGastric AcidGastrinsStomach UlcerVenous InsufficiencyHernia, HiatalAnti-Ulcer AgentsPeptic UlcerEsophagogastric JunctionOmeprazoleAntacidsChronic DiseaseStomach DiseasesEsophagoscopyDyspepsiaDuodenal UlcerBarrett EsophagusPepsinogen CFundoplicationHelicobacter felisEndoscopyHelicobacter heilmanniiParietal Cells, GastricDuodenitisAnemia, PerniciousEndoscopy, Digestive System2-PyridinylmethylsulfinylbenzimidazolesHydrogen-Ion ConcentrationHelicobacterUreaseGastric FundusVaricose VeinsPepsinogensPrecancerous ConditionsPeristalsisLansoprazoleLaryngitisAtrophyEsophageal Sphincter, LowerCisaprideUltrasonography, Doppler, DuplexCampylobacterEructationAcinonyxAmoxicillinAntigens, BacterialRabeprazoleH(+)-K(+)-Exchanging ATPaseHistamine H2 AntagonistsEsomeprazolePopliteal VeinEsophageal Motility DisordersProspective StudiesDuodenumAutoimmune DiseasesVaricose UlcerEsophageal StenosisSaphenous VeinGastrectomyAntibodies, BacterialGastrointestinal DiseasesSeverity of Illness IndexRanitidine