Bile RefluxGastritisDuodenogastric RefluxPostgastrectomy SyndromesGastroesophageal RefluxGastritis, AtrophicGastroenterostomyAnastomosis, Roux-en-YSyndromeStomachPyloric AntrumGastric JuiceBiliary Tract DiseasesGastric EmptyingHelicobacter pyloriVesico-Ureteral RefluxVagotomyHelicobacter InfectionsEndoscopy, GastrointestinalGastric MucosaGallbladderBile DuctsEsophagitis, PepticBiopsyEsophagusGastroscopyMetaplasiaGastritis, HypertrophicLaryngopharyngeal RefluxPostoperative ComplicationsEsophagitisPepsinogen AEsophageal pH MonitoringStomach NeoplasmsDown SyndromeMetabolic Syndrome XAchlorhydriaHeartburnManometryProton Pump InhibitorsGastric Acidity DeterminationGastrinsGastric AcidVenous InsufficiencyStomach UlcerHernia, HiatalAnti-Ulcer AgentsChronic DiseasePeptic UlcerEsophagogastric JunctionOmeprazoleAntacidsStomach DiseasesDyspepsiaEsophagoscopyDuodenal UlcerBarrett EsophagusPepsinogen CFundoplicationNephrotic SyndromeSjogren's SyndromeEndoscopyHelicobacter felisHelicobacter heilmanniiAnemia, PerniciousParietal Cells, GastricDuodenitisEndoscopy, Digestive System2-PyridinylmethylsulfinylbenzimidazolesHydrogen-Ion ConcentrationHelicobacterVaricose VeinsUreaseGastric FundusPrecancerous ConditionsTurner SyndromePepsinogensPeristalsisAbnormalities, MultipleProspective StudiesLansoprazoleMyelodysplastic SyndromesAtrophyTreatment OutcomeRisk FactorsCushing SyndromeSeverity of Illness IndexLaryngitisCisapridePrevalenceUltrasonography, Doppler, DuplexEsophageal Sphincter, LowerAcute Coronary SyndromePolycystic Ovary SyndromeFollow-Up StudiesCampylobacterAutoimmune DiseasesRetrospective StudiesWilliams SyndromeEructation