Helicobacter pyloriHelicobacter InfectionsGastric AcidOmeprazoleAnti-Ulcer AgentsAmoxicillinClarithromycinGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleDuodenal UlcerLansoprazolePentagastrinTinidazoleProton Pump InhibitorsGastrinsGastritisPeptic UlcerGastric JuiceRanitidineDrug Therapy, CombinationDyspepsiaEsophagusAnti-Bacterial AgentsStomachRabeprazoleFurazolidoneAntacidsStomach UlcerParietal Cells, GastricHelicobacterHistamine H2 AntagonistsBreath TestsSulfoxidesBarrett EsophagusAntitrichomonal AgentsStomach NeoplasmsUreasePyloric AntrumGastroscopyBethanechol CompoundsPenicillinsAchlorhydriaGastric Acidity DeterminationBenzimidazolesHistamineSecretory RateGastritis, AtrophicLymphoma, B-Cell, Marginal ZoneGastroesophageal RefluxEsophagitis, PepticMetaplasiaCimetidinePeptonesStomach DiseasesTetracyclineAminopyrineH(+)-K(+)-Exchanging ATPaseVagotomyTreatment OutcomeFamotidineEndoscopy, GastrointestinalUreaEsomeprazoleEsophagitisMetiamideTetragastrinDuodenitisGastric FistulaOrganometallic CompoundsLevofloxacinBacterial ProteinsVagotomy, Proximal GastricNifuratelYogurtVagus NerveProspective StudiesBethanecholAnti-Infective AgentsPylorusDisease EradicationOfloxacinEndoscopySomatostatinPepsinogen ADrug Administration ScheduleHydrogen-Ion ConcentrationAntigens, BacterialDanazolGastric EmptyingRifabutinEnterochromaffin-like CellsHydrochloric AcidTreatment FailureBenzoxepinsPepsinogensDrug Resistance, BacterialTime FactorsDuodenum