Hydrogen SulfideRanitidineOrganometallic CompoundsSulfidesAntacidsAnti-Ulcer AgentsMetronidazoleSalicylatesAmoxicillinHelicobacter pyloriHelicobacter InfectionsClarithromycinHistamine H2 AntagonistsFurazolidoneDimercaprolTinidazoleDuodenal UlcerCystathionine gamma-LyaseDrug Therapy, CombinationTetracyclineOmeprazoleGermaniumKlatskin's TumorAnti-Bacterial AgentsSucralfateThiosulfatesPeptic UlcerSulfur OxidesAntimonyDyspepsiaPenicillinsRadiation ProtectionSulfurHydrocarbons, IodinatedColloidsGastric MucinsProton Pump InhibitorsSulfoxidesThymolphthaleinHepatic Duct, CommonBreath TestsScintillation CountingBiliary Tract Surgical ProceduresGastritisSulindacCystathionine beta-Synthase2-PyridinylmethylsulfinylbenzimidazolesAntidiarrhealsCimetidineBile Ducts, IntrahepaticMustard GasGastric MucosaAlpha ParticlesGastroscopyTooth DiscolorationAllyl CompoundsStomach UlcerResins, SyntheticAntitrichomonal AgentsErythromycin EthylsuccinateBile Duct NeoplasmsElectrodesSpectrophotometry, AtomicMyoclonusDrug CombinationsProsthesis ColoringMetals, HeavyCampylobacterLansoprazoleSilicatesSulfur CompoundsAlkynesCampylobacter InfectionsSulfhydryl CompoundsDuodenumIndiumCholangiocarcinomaNitroimidazolesRadiation-Protective AgentsTreatment OutcomeMetalsSulfatesSalmonellaOxidation-ReductionLevofloxacinBacteriaMetallothioneinUreaseStomach DiseasesBile DuctsPolychaetaSulfonium CompoundsCulture MediaOrganothiophosphorus CompoundsAnti-Infective AgentsDental CementsDrug Resistance, MicrobialDouble-Blind MethodCadmiumAnti-Infective Agents, Local