GastritisAbdomenGastritis, AtrophicLaparotomyCystsTomography, X-Ray ComputedAbdomen, AcuteHelicobacter pyloriGastric MucosaHelicobacter InfectionsSensitivity and SpecificityPyloric AntrumGastritis, HypertrophicStomachGastroscopyMetaplasiaPepsinogen AStomach NeoplasmsAchlorhydriaBile RefluxStomach UlcerGastrinsPeptic UlcerStomach DiseasesUpper ExtremityPepsinogen CRadiography, AbdominalDuodenal UlcerChronic DiseaseHelicobacter felisBiopsyDuodenitisHelicobacter heilmanniiAnemia, PerniciousParietal Cells, GastricDyspepsiaUpper Gastrointestinal TractHelicobacterAbdominal InjuriesUreaseGastric JuicePepsinogensPostgastrectomy SyndromesAbdominal NeoplasmsEndoscopy, GastrointestinalEndoscopyPrecancerous ConditionsCampylobacterAtrophyAcinonyxAnti-Ulcer AgentsAbdominal PainEndoscopy, Digestive SystemThoraxGastric AcidAntigens, BacterialH(+)-K(+)-Exchanging ATPaseAmoxicillinAbdominal Wound Closure TechniquesOmeprazoleGastrointestinal HemorrhageDuodenogastric RefluxGastrointestinal DiseasesAutoimmune DiseasesGastric FundusAntibodies, BacterialGastroenterostomyIntrinsic FactorGastric Acidity DeterminationDuodenumBacterial ProteinsBismuthAbdominal CavityDuodenal DiseasesThymectomyGastroesophageal RefluxCampylobacter InfectionsRetrospective StudiesAntacidsProspective StudiesEsophagitisTreatment OutcomeLymphocytosisIntestinal ObstructionAbdominal WallImmunohistochemistryEsophagitis, PepticGastrin-Secreting CellsPneumoperitoneum