GastritisGastric MucosaGastritis, AtrophicHelicobacter pyloriHelicobacter InfectionsPyloric AntrumStomachStomach UlcerMetaplasiaStomach NeoplasmsGastritis, HypertrophicGastroscopyStomach DiseasesIntestinal MucosaPepsinogen AGastrinsParietal Cells, GastricAchlorhydriaGastric JuiceBile RefluxPeptic UlcerPepsinogensDuodenal UlcerHelicobacterPepsinogen CGastric AcidHelicobacter heilmanniiHelicobacter felisBiopsyMouth MucosaChronic DiseaseUreaseAnemia, PerniciousDuodenitisPrecancerous ConditionsDyspepsiaAnti-Ulcer AgentsH(+)-K(+)-Exchanging ATPasePostgastrectomy SyndromesGastric FundusEndoscopy, GastrointestinalCampylobacterAtrophyEndoscopyNasal MucosaOmeprazoleGastric MucinsChoristomaAntigens, BacterialDuodenumDuodenogastric RefluxAmoxicillinEndoscopy, Digestive SystemImmunohistochemistryIntrinsic FactorMucous MembraneAcinonyxGastric Acidity DeterminationBacterial ProteinsAutoimmune DiseasesAntibodies, BacterialBismuthGastrin-Secreting CellsGerbillinaePentagastrinGastroenterostomyAdenocarcinomaGastrointestinal HemorrhageGastrectomyPylorusHydrochloric AcidGastrointestinal DiseasesDuodenal DiseasesLymphoma, B-Cell, Marginal ZoneCampylobacter InfectionsEnterochromaffin-like CellsThymectomyEsophagitisPolymerase Chain Reaction2-PyridinylmethylsulfinylbenzimidazolesSucralfateCimetidineEthanolLewis Blood-Group SystemGastroesophageal RefluxLansoprazoleMucusProton Pump InhibitorsAnti-Inflammatory Agents, Non-SteroidalIntestinesMicroscopy, ElectronEnterochromaffin CellsHyperplasiaRNA, MessengerGefarnateBarrett EsophagusAntacidsIndomethacinClarithromycinDinoprostone