Breath TestsHelicobacter InfectionsHelicobacter pyloriUreaLactuloseGastric EmptyingCarbon IsotopesFecesAminopyrineCaprylatesHydrogenLactose IntoleranceAnti-Ulcer AgentsExhalationDyspepsiaOmeprazoleClarithromycinCarbon RadioisotopesAmoxicillin2-PyridinylmethylsulfinylbenzimidazolesGastrointestinal TransitCarbon DioxideBismuthUreaseMetronidazoleTinidazoleMalabsorption SyndromesSensitivity and SpecificityChylomicron RemnantsLactose Tolerance TestLansoprazoleFalse Negative ReactionsLiver Function TestsSulfoxidesDuodenal UlcerPeptic UlcerAcetamidesDrug Therapy, CombinationAnti-Bacterial AgentsFurazolidoneIntestine, SmallDiarrheaGastroparesisBlind Loop SyndromeRanitidineLactoseRabeprazoleIleocecal ValveLoperamideIrritable Bowel SyndromeSpectrophotometry, InfraredProton Pump InhibitorsGastroscopyExocrine Pancreatic InsufficiencyStomachGastrointestinal MotilityPancreatinAntitrichomonal AgentsPentanesEndoscopy, GastrointestinalBreath HoldingMineral WatersSteatorrheaSpirulinaMethaneFlatulenceGastritisIntestinal DiseasesDihydropyrimidine Dehydrogenase DeficiencyPhenolsulfonphthaleinGastrointestinal AgentsReproducibility of ResultsPropanthelineRespirationProspective StudiesTime FactorsGlutethimideDiphenoxylateDefecationIntestinal AbsorptionGastroenteritisAchlorhydriaLiver CirrhosisMucositisPredictive Value of TestsRespiratory MechanicsPancreatic ExtractsBenzimidazolesTrioleinGastrointestinal DiseasesAntacidsYogurtVolatile Organic CompoundsAcetic AcidIntestinal Diseases, ParasiticBiliopancreatic DiversionMouthEsomeprazoleSprue, TropicalTreatment Outcome