Helicobacter pyloriHelicobacter InfectionsGastric AcidOmeprazoleAnti-Ulcer AgentsAmoxicillinClarithromycinGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleDuodenal UlcerLansoprazolePentagastrinTinidazoleProton Pump InhibitorsGastrinsGastritisPeptic UlcerGastric JuiceDrug Therapy, CombinationRanitidineDyspepsiaAnti-Bacterial AgentsStomachRabeprazoleFurazolidoneAntacidsParietal Cells, GastricStomach UlcerHelicobacterHistamine H2 AntagonistsBreath TestsSulfoxidesAntitrichomonal AgentsUreaseStomach NeoplasmsPyloric AntrumBethanechol CompoundsGastroscopyPenicillinsAchlorhydriaGastric Acidity DeterminationBenzimidazolesHistamineSecretory RateGastritis, AtrophicInflammationLymphoma, B-Cell, Marginal ZoneCimetidinePeptonesEsophagitis, PepticGastroesophageal RefluxTetracyclineAminopyrineStomach DiseasesMetaplasiaH(+)-K(+)-Exchanging ATPaseVagotomyTreatment OutcomeFamotidineUreaEsomeprazoleEndoscopy, GastrointestinalMetiamideDuodenitisTetragastrinGastric FistulaOrganometallic CompoundsLevofloxacinEsophagitisBacterial ProteinsVagotomy, Proximal GastricNifuratelYogurtProspective StudiesVagus NerveBethanecholAnti-Infective AgentsOfloxacinDisease EradicationPylorusSomatostatinPepsinogen ADrug Administration ScheduleAntigens, BacterialHydrogen-Ion ConcentrationDanazolEndoscopyRifabutinGastric EmptyingEnterochromaffin-like CellsTreatment FailureBenzoxepinsPepsinogensDrug Resistance, BacterialTime FactorsDouble-Blind MethodAntibodies, BacterialHydrochloric Acid