GastritisGastric MucosaGastritis, AtrophicHelicobacter pyloriHelicobacter InfectionsStomach UlcerIntestinal MucosaStomachPyloric AntrumMetaplasiaStomach NeoplasmsStomach DiseasesGastroscopyParietal Cells, GastricGastritis, HypertrophicGastric JuiceMouth MucosaGastrinsPepsinogen AGastric AcidBile RefluxPepsinogensAchlorhydriaHelicobacterPeptic UlcerDuodenal UlcerBiopsyAnti-Ulcer AgentsNasal MucosaH(+)-K(+)-Exchanging ATPaseHelicobacter heilmanniiPrecancerous ConditionsUreaseHelicobacter felisPepsinogen CChoristomaGastric FundusChronic DiseaseGastric MucinsAnemia, PerniciousDyspepsiaDuodenitisEndoscopy, GastrointestinalDuodenumPostgastrectomy SyndromesMucous MembraneCampylobacterImmunohistochemistryOmeprazoleAtrophyEndoscopyHydrochloric AcidPentagastrinDuodenogastric RefluxAntigens, BacterialIntrinsic FactorAmoxicillinEndoscopy, Digestive SystemGastric Acidity DeterminationBacterial ProteinsEthanolPylorusMucusCimetidineIndomethacinGastrointestinal HemorrhageHistamineAdenocarcinomaMeckel DiverticulumRats, WistarRe-EpithelializationMicroscopy, ElectronPepsin AGerbillinaeAnti-Inflammatory Agents, Non-SteroidalRNA, MessengerCathepsin EAntibodies, BacterialSucralfateDinoprostoneGastrin-Secreting CellsMucinsGastrectomyAutoimmune DiseasesEnterochromaffin-like CellsColonDuodenal DiseasesLewis Blood-Group SystemAcinonyxEpithelial CellsBarrett Esophagus16,16-Dimethylprostaglandin E2Enterochromaffin CellsHyperplasiaBismuthLymphoma, B-Cell, Marginal ZoneTime FactorsGefarnateEsophagusTetragastrin