GastritisGastritis, AtrophicAnti-Inflammatory Agents, Non-SteroidalHelicobacter pyloriGastric MucosaHelicobacter InfectionsPyloric AntrumGastritis, HypertrophicMetaplasiaStomachGastroscopyCyclooxygenase 2 InhibitorsPepsinogen AStomach UlcerStomach NeoplasmsPeptic UlcerIbuprofenAchlorhydriaCyclooxygenase InhibitorsDiclofenacBile RefluxNaproxenDuodenal UlcerStomach DiseasesGastrinsGastrointestinal DiseasesPepsinogen CChronic DiseaseDyspepsiaHelicobacter felisHelicobacter heilmanniiParietal Cells, GastricDuodenitisAnemia, PerniciousAspirinBiopsyCyclooxygenase 2Prostaglandin-Endoperoxide SynthasesAnti-Ulcer AgentsHelicobacterUreasePepsinogensKetoprofenEndoscopy, GastrointestinalPostgastrectomy SyndromesGastric JuiceCyclooxygenase 1SulindacAcetaminophenGastrointestinal HemorrhageSulfonamidesPrecancerous ConditionsIndomethacinPiroxicamThiazinesSulfonesPyrazolesLactonesCampylobacterAnalgesics, Non-NarcoticAtrophyAcinonyxOmeprazoleGastric AcidEndoscopyEtodolacNitrobenzenesAntigens, BacterialH(+)-K(+)-Exchanging ATPaseAmoxicillinAutoimmune DiseasesRisk FactorsProton Pump InhibitorsDuodenogastric RefluxPeptic Ulcer HemorrhageGastric FundusAntibodies, BacterialEndoscopy, Digestive SystemGastroenterostomyUpper Gastrointestinal TractSafety-Based Drug WithdrawalsIntrinsic FactorOsteoarthritisDrug Therapy, CombinationGastric Acidity DeterminationIsoenzymesBismuthBacterial ProteinsThymectomyCase-Control StudiesDinoprostoneCampylobacter InfectionsEsophagitisAntacidsLymphocytosisProspective StudiesGastroesophageal RefluxGastrin-Secreting CellsArthritis