Breath TestsHelicobacter InfectionsHelicobacter pyloriUreaGastric EmptyingCarbon IsotopesLactuloseAminopyrineCaprylatesHydrogenLactose IntoleranceAnti-Ulcer AgentsExhalationDyspepsiaOmeprazoleClarithromycinAmoxicillinCarbon Radioisotopes2-PyridinylmethylsulfinylbenzimidazolesBismuthCarbon DioxideUreaseGastrointestinal TransitMetronidazoleTinidazoleChylomicron RemnantsDrug Therapy, CombinationLansoprazoleLactose Tolerance TestMalabsorption SyndromesLiver Function TestsFalse Negative ReactionsSulfoxidesSensitivity and SpecificityTreatment OutcomePeptic UlcerDuodenal UlcerAcetamidesAnti-Bacterial AgentsFurazolidoneGastroparesisIntestine, SmallRanitidineBlind Loop SyndromeRabeprazoleIleocecal ValveLactoseProton Pump InhibitorsSpectrophotometry, InfraredGastroscopyStomachTime FactorsAntitrichomonal AgentsPentanesMineral WatersProspective StudiesBreath HoldingDouble-Blind MethodLoperamideEndoscopy, GastrointestinalSpirulinaIrritable Bowel SyndromeExocrine Pancreatic InsufficiencyFecesGastritisMethaneSteatorrheaPancreatinDihydropyrimidine Dehydrogenase DeficiencyPhenolsulfonphthaleinGastrointestinal MotilityPropanthelineReproducibility of ResultsRespirationGastrointestinal AgentsAdministration, OralFlatulenceGlutethimideDiphenoxylateBenzimidazolesMucositisLiver CirrhosisIntestinal DiseasesAchlorhydriaRespiratory MechanicsAntacidsIntestinal AbsorptionPancreatic ExtractsTrioleinPredictive Value of TestsCross-Over StudiesAcetic AcidVolatile Organic CompoundsEsomeprazoleDrug Administration ScheduleErythromycinBiliopancreatic DiversionTidal VolumeSprue, TropicalMouth