Breath TestsHydrogenHydrogen BondingHydrogen PeroxideHelicobacter InfectionsHelicobacter pyloriUreaLactuloseCarbon IsotopesGastric EmptyingHydrogen SulfideAminopyrineCaprylatesLactose IntoleranceAnti-Ulcer AgentsExhalationDyspepsiaCarbon RadioisotopesOmeprazoleClarithromycinAmoxicillin2-PyridinylmethylsulfinylbenzimidazolesCarbon DioxideBismuthGastrointestinal TransitUreaseLactose Tolerance TestTinidazoleMetronidazoleChylomicron RemnantsMalabsorption SyndromesLansoprazoleLiver Function TestsFalse Negative ReactionsSulfoxidesAcetamidesDuodenal UlcerPeptic UlcerSensitivity and SpecificityDrug Therapy, CombinationIntestine, SmallAnti-Bacterial AgentsBlind Loop SyndromeMethaneGastroparesisFurazolidoneLactoseRanitidineRabeprazoleIleocecal ValveSpectrophotometry, InfraredProton Pump InhibitorsStomachGastroscopyPentanesAntitrichomonal AgentsLoperamideBreath HoldingSpirulinaMineral WatersFlatulenceIrritable Bowel SyndromeGastrointestinal MotilityExocrine Pancreatic InsufficiencyGastritisFecesEndoscopy, GastrointestinalPhenolsulfonphthaleinSteatorrheaDihydropyrimidine Dehydrogenase DeficiencyPancreatinRespirationHydrogen CyanidePropanthelineTime FactorsDiphenoxylateReproducibility of ResultsGlutethimideAcetic AcidAchlorhydriaIntestinal DiseasesGastrointestinal AgentsMucositisBenzimidazolesLiver CirrhosisMass SpectrometryIntestinal AbsorptionRespiratory MechanicsModels, MolecularProspective StudiesTrioleinAntacidsPancreatic ExtractsVolatile Organic CompoundsMouthOxidation-ReductionBiliopancreatic DiversionLactaseHydrogen-Ion ConcentrationTidal Volume