GastritisGastritis, AtrophicHelicobacter pyloriGastric MucosaHelicobacter InfectionsInflammatory Bowel DiseasesIrritable Bowel SyndromePyloric AntrumGastritis, HypertrophicStomachMetaplasiaGastroscopyPepsinogen AStomach NeoplasmsAchlorhydriaBile RefluxStomach UlcerGastrinsShort Bowel SyndromePeptic UlcerChronic DiseaseDyspepsiaStomach DiseasesPepsinogen CDuodenal UlcerCrohn DiseaseBiopsyHelicobacter felisDuodenitisHelicobacter heilmanniiAnemia, PerniciousParietal Cells, GastricEndoscopy, GastrointestinalColitis, UlcerativeHelicobacterGastric JuiceUreasePostgastrectomy SyndromesPepsinogensGastrointestinal DiseasesPrecancerous ConditionsEndoscopySeverity of Illness IndexConstipationAtrophyAnti-Ulcer AgentsCampylobacterDepressionSymptom AssessmentProspective StudiesTreatment OutcomeIntestinal MucosaIntestinal DiseasesPrevalenceAcinonyxIntestinesGastric AcidQuestionnairesGastroesophageal RefluxDefecationAntigens, BacterialRisk FactorsEndoscopy, Digestive SystemOmeprazoleAutoimmune DiseasesFollow-Up StudiesAmoxicillinColonH(+)-K(+)-Exchanging ATPaseDuodenogastric RefluxAntibodies, BacterialGastroenterostomyRetrospective StudiesGastric FundusTime FactorsAbdominal PainGastric Acidity DeterminationDuodenumEsophagitisGastrointestinal AgentsIntestine, LargeIntrinsic FactorGastrointestinal HemorrhageColitisAntacidsBismuthBacterial ProteinsThymectomyCase-Control StudiesIntestinal NeoplasmsBarium SulfateGastrointestinal MotilityCampylobacter InfectionsBehavioral SymptomsQuality of LifePsychiatric Status Rating ScalesColonic DiseasesGastrointestinal TransitNeurogenic BowelEsophagitis, Peptic