Helicobacter pyloriHelicobacter InfectionsGastric AcidOmeprazoleAnti-Ulcer AgentsAmoxicillinClarithromycinGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleDuodenal UlcerLansoprazolePentagastrinTinidazoleProton Pump InhibitorsGastrinsGastritisPeptic UlcerGastric JuiceRanitidineDrug Therapy, CombinationDyspepsiaAnti-Bacterial AgentsStomachRabeprazoleFurazolidoneAntacidsParietal Cells, GastricStomach UlcerHelicobacterHistamine H2 AntagonistsBreath TestsSulfoxidesAntitrichomonal AgentsUreaseStomach NeoplasmsPyloric AntrumBethanechol CompoundsGastroscopyPenicillinsAchlorhydriaGastric Acidity DeterminationBenzimidazolesHistamineSecretory RateGastritis, AtrophicLymphoma, B-Cell, Marginal ZoneCimetidinePeptonesEsophagitis, PepticGastroesophageal RefluxTetracyclineAntigens, BacterialAminopyrineStomach DiseasesH(+)-K(+)-Exchanging ATPaseMetaplasiaVagotomyFamotidineTreatment OutcomeUreaEsomeprazoleEndoscopy, GastrointestinalMetiamideTetragastrinDuodenitisBacterial ProteinsGastric FistulaOrganometallic CompoundsLevofloxacinEsophagitisVagotomy, Proximal GastricNifuratelAntigensYogurtProspective StudiesVagus NerveBethanecholAnti-Infective AgentsOfloxacinDisease EradicationPylorusSomatostatinPepsinogen ADrug Administration ScheduleHydrogen-Ion ConcentrationDanazolAntibodies, BacterialEndoscopyRifabutinEnterochromaffin-like CellsGastric EmptyingTreatment FailureBenzoxepinsPepsinogensDrug Resistance, BacterialTime FactorsDouble-Blind MethodPurpura, Thrombocytopenic, Idiopathic