Helicobacter pyloriHelicobacter InfectionsGastric AcidOmeprazoleAnti-Ulcer AgentsAmoxicillinClarithromycinGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleDuodenal UlcerLansoprazolePentagastrinTinidazoleProton Pump InhibitorsGastrinsGastritisPeptic UlcerGastric JuiceDrug Therapy, CombinationRanitidineDyspepsiaAnti-Bacterial AgentsStomachRabeprazoleFurazolidoneAntacidsParietal Cells, GastricStomach UlcerHelicobacterHistamine H2 AntagonistsBreath TestsSulfoxidesAntitrichomonal AgentsUreaseStomach NeoplasmsBethanechol CompoundsPyloric AntrumGastroscopyPenicillinsAchlorhydriaGastric Acidity DeterminationBenzimidazolesHistamineSecretory RateGastritis, AtrophicLymphoma, B-Cell, Marginal ZoneCimetidinePeptonesEsophagitis, PepticGastroesophageal RefluxTetracyclineAminopyrineStomach DiseasesH(+)-K(+)-Exchanging ATPaseMetaplasiaVagotomyTreatment OutcomeFamotidineUreaEsomeprazoleEndoscopy, GastrointestinalMetiamideTetragastrinDuodenitisBacterial ProteinsGastric FistulaOrganometallic CompoundsLevofloxacinEsophagitisVagotomy, Proximal GastricNifuratelYogurtProspective StudiesAntigens, BacterialVagus NerveBethanecholAnti-Infective AgentsDisease EradicationOfloxacinPylorusAntibodies, BacterialSomatostatinPepsinogen ADrug Administration ScheduleHydrogen-Ion ConcentrationDanazolEndoscopyRifabutinGastric EmptyingEnterochromaffin-like CellsTime FactorsTreatment FailureBenzoxepinsDrug Resistance, BacterialPepsinogensPurpura, Thrombocytopenic, IdiopathicDouble-Blind MethodHydrochloric Acid