Helicobacter pyloriHelicobacter InfectionsGastric AcidOmeprazoleAnti-Ulcer AgentsAmoxicillinClarithromycinGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleDuodenal UlcerLansoprazolePentagastrinTinidazoleProton Pump InhibitorsGastrinsGastritisPeptic UlcerGastric JuiceDrug Therapy, CombinationRanitidineDyspepsiaAnti-Bacterial AgentsStomachRabeprazoleFurazolidoneAntacidsParietal Cells, GastricStomach UlcerHelicobacterHistamine H2 AntagonistsBreath TestsSulfoxidesAntitrichomonal AgentsUreaseStomach NeoplasmsPenicillinsPyloric AntrumBethanechol CompoundsGastroscopyAchlorhydriaGastric Acidity DeterminationBenzimidazolesHistamineSecretory RateGastritis, AtrophicLymphoma, B-Cell, Marginal ZoneCimetidineTetracyclinePeptonesEsophagitis, PepticGastroesophageal RefluxAminopyrineStomach DiseasesH(+)-K(+)-Exchanging ATPaseMetaplasiaVagotomyTreatment OutcomeFamotidineUreaEsomeprazoleEndoscopy, GastrointestinalMetiamideBacterial ProteinsTetragastrinDuodenitisLevofloxacinGastric FistulaOrganometallic CompoundsEsophagitisAnti-Infective AgentsVagotomy, Proximal GastricNifuratelYogurtProspective StudiesVagus NerveBethanecholDrug Resistance, BacterialOfloxacinDisease EradicationPylorusDrug Administration ScheduleSomatostatinPepsinogen AAntigens, BacterialHydrogen-Ion ConcentrationDanazolRifabutinEndoscopyTreatment FailureEnterochromaffin-like CellsGastric EmptyingBenzoxepinsAzithromycinPepsinogensMicrobial Sensitivity TestsDouble-Blind MethodTime FactorsAntibodies, Bacterial