GastritisGastritis, AtrophicHelicobacter pyloriGastric MucosaHelicobacter InfectionsInflammatory Bowel DiseasesPyloric AntrumIrritable Bowel SyndromeGastritis, HypertrophicMetaplasiaStomachGastroscopyPepsinogen AStomach NeoplasmsAchlorhydriaBile RefluxStomach UlcerGastrinsShort Bowel SyndromePeptic UlcerPepsinogen CStomach DiseasesDuodenal UlcerCrohn DiseaseHelicobacter felisHelicobacter heilmanniiDuodenitisParietal Cells, GastricChronic DiseaseAnemia, PerniciousDyspepsiaBiopsyHelicobacterEndoscopy, GastrointestinalColitis, UlcerativeGastric JuiceUreasePepsinogensPostgastrectomy SyndromesPrecancerous ConditionsCampylobacterEndoscopyAtrophyIntestinal MucosaAcinonyxAnti-Ulcer AgentsIntestinal DiseasesIntestinesAntigens, BacterialGastric AcidH(+)-K(+)-Exchanging ATPaseGastrointestinal DiseasesAutoimmune DiseasesAmoxicillinEndoscopy, Digestive SystemColonConstipationOmeprazoleDuodenogastric RefluxDefecationGastroenterostomyGastric FundusAntibodies, BacterialAbdominal PainIntrinsic FactorIntestine, LargeGastric Acidity DeterminationColitisBismuthBacterial ProteinsDuodenumThymectomyIntestinal NeoplasmsCampylobacter InfectionsGastrointestinal HemorrhageNeurogenic BowelEsophagitisBarium SulfateAntacidsLymphocytosisGastrointestinal MotilityGastroesophageal RefluxGastrointestinal AgentsColonic DiseasesGastrointestinal TransitDuodenal DiseasesMalabsorption SyndromesGastrin-Secreting CellsIleitis