GastritisGastritis, AtrophicHelicobacter pyloriGastric MucosaHelicobacter InfectionsPostoperative ComplicationsPyloric AntrumGastritis, HypertrophicGastroscopyMetaplasiaStomachPepsinogen AStomach NeoplasmsAchlorhydriaBile RefluxStomach UlcerGastrinsPeptic UlcerTreatment OutcomeRetrospective StudiesPepsinogen CStomach DiseasesChronic DiseaseIntraoperative ComplicationsDuodenal UlcerHelicobacter felisBiopsyHelicobacter heilmanniiAnemia, PerniciousParietal Cells, GastricDuodenitisEndoscopyDyspepsiaHelicobacterEndoscopy, GastrointestinalUreasePostgastrectomy SyndromesPepsinogensGastric JuiceFollow-Up StudiesProspective StudiesRisk FactorsPrecancerous ConditionsDiabetes ComplicationsTime FactorsAtrophyCampylobacterPregnancy ComplicationsAcinonyxAnti-Ulcer AgentsEndoscopy, Digestive SystemAntigens, BacterialGastric AcidGastroenterostomyH(+)-K(+)-Exchanging ATPaseAutoimmune DiseasesAmoxicillinGastrointestinal DiseasesReoperationOmeprazoleGastric FundusDuodenogastric RefluxAntibodies, BacterialGastrointestinal HemorrhageIntrinsic FactorBiliary Tract DiseasesGastric Acidity DeterminationIncidenceThymectomyLength of StayBismuthGastrectomyBacterial ProteinsTomography, X-Ray ComputedObstetric Labor ComplicationsSeverity of Illness IndexEsophagitisLaparoscopyGastroesophageal RefluxSurgical Wound InfectionAntacidsCampylobacter InfectionsPrevalenceDuodenal DiseasesEquipment FailureDuodenumHemorrhageAcute DiseaseLymphocytosisDevice RemovalRisk AssessmentAnastomosis, SurgicalDrainageDrug Therapy, CombinationEsophagitis, PepticForeign-Body MigrationGastrin-Secreting CellsAnti-Bacterial Agents