Helicobacter pyloriHelicobacter InfectionsGastric AcidPeptic UlcerAnti-Ulcer AgentsOmeprazoleAmoxicillinClarithromycinDuodenal UlcerGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleLansoprazoleStomach UlcerTinidazolePentagastrinProton Pump InhibitorsGastritisDyspepsiaGastrinsGastric JuiceRanitidineDrug Therapy, CombinationPeptic Ulcer HemorrhageAnti-Bacterial AgentsStomachRabeprazoleAntacidsFurazolidoneHistamine H2 AntagonistsParietal Cells, GastricHelicobacterBreath TestsPeptic Ulcer PerforationSulfoxidesAntitrichomonal AgentsStomach NeoplasmsGastroscopyUreasePyloric AntrumBethanechol CompoundsGastric Acidity DeterminationPenicillinsBenzimidazolesAchlorhydriaGastritis, AtrophicCimetidineHistamineSecretory RateLymphoma, B-Cell, Marginal ZoneStomach DiseasesVagotomyEndoscopy, GastrointestinalGastroesophageal RefluxPeptonesTetracyclineEsophagitis, PepticAminopyrineTreatment OutcomeMetaplasiaEsomeprazoleFamotidineH(+)-K(+)-Exchanging ATPaseDuodenitisUreaTetragastrinGastric FistulaEsophagitisVagotomy, Proximal GastricOrganometallic CompoundsBacterial ProteinsMetiamideLevofloxacinProspective StudiesPylorusNifuratelEndoscopyYogurtAntigens, BacterialAnti-Infective AgentsVagus NerveBethanecholPepsinogen ADrug Administration ScheduleOfloxacinDisease EradicationSomatostatinPepsinogensHydrogen-Ion ConcentrationGastric EmptyingDanazolDuodenumRifabutinEnterochromaffin-like CellsAntibodies, BacterialDrug Resistance, BacterialTreatment FailureDouble-Blind MethodBenzoxepins