ArsenicArsenic PoisoningRanitidineOrganometallic CompoundsArsenicalsAntacidsAnti-Ulcer AgentsMetronidazoleSalicylatesOxidesAmoxicillinHelicobacter pyloriHelicobacter InfectionsClarithromycinHistamine H2 AntagonistsDimercaprolWater Pollutants, ChemicalCacodylic AcidFurazolidoneArsenitesTinidazoleDuodenal UlcerDrug Therapy, CombinationArsenatesTetracyclineDrinking WaterOmeprazoleGermaniumKlatskin's TumorAnti-Bacterial AgentsSodium CompoundsAntimonySucralfateWater SupplyPeptic UlcerBangladeshSpectrophotometry, AtomicDyspepsiaPenicillinsNailsRadiation ProtectionEnvironmental ExposureHydrocarbons, IodinatedWater Pollution, ChemicalGastric MucinsProton Pump InhibitorsThymolphthaleinMetals, HeavyHepatic Duct, CommonColloidsScintillation CountingBiliary Tract Surgical ProceduresGastritisBreath TestsWater Wells2-PyridinylmethylsulfinylbenzimidazolesAntidiarrhealsCimetidineBile Ducts, IntrahepaticGastric MucosaSoil PollutantsAlpha ParticlesGastroscopyTooth DiscolorationResins, SyntheticAntitrichomonal AgentsErythromycin EthylsuccinateBile Duct NeoplasmsStomach UlcerSulfoxidesNew HampshireElectrodesMyoclonusDrug CombinationsMetalsEnvironmental MonitoringProsthesis ColoringLeadCampylobacterLansoprazoleWater PollutantsSilicatesGroundwaterSkin DiseasesRoxarsoneCampylobacter InfectionsTreatment OutcomePterisDuodenumIndiumCholangiocarcinomaMetallothioneinNitroimidazolesRadiation-Protective AgentsArsenate ReductasesSalmonellaFood ContaminationCadmiumLevofloxacinDrug Resistance, Microbial