Breath TestsExhalationPentanesBreath HoldingLactuloseRespirationHydrogenRespiratory MechanicsVolatile Organic CompoundsCarbon IsotopesTidal VolumeCarbon DioxideLactose IntoleranceGastric EmptyingHelicobacter InfectionsUreaHelicobacter pyloriEthanePulmonary VentilationAcetoneVolatilizationLactose Tolerance TestHalitosisInhalationAminopyrineCaprylatesRespiratory RateCarbon MonoxideRespiratory Function TestsDyspneaGastrointestinal TransitPulmonary Gas ExchangeHemiterpenesRespiratory Physiological PhenomenaLung Volume MeasurementsCarbon RadioisotopesMethaneChromatography, GasMalabsorption SyndromesAirway ResistanceSensitivity and SpecificityAnti-Ulcer AgentsSulfur CompoundsApneaLungAuscultationGasesDyspepsiaRespiratory SoundsReproducibility of ResultsRespiration, ArtificialOmeprazoleLactoseHyperventilationBiological MarkersAmoxicillinClarithromycinTime Factors2-PyridinylmethylsulfinylbenzimidazolesFunctional Residual CapacityUreaseEthanolBismuthForced Expiratory VolumeMasksAir PressureResidual VolumeTrichloroethanesGas Chromatography-Mass SpectrometryReference ValuesLung DiseasesFalse Negative ReactionsChylomicron RemnantsRespiratory Dead SpaceMetronidazoleSpirometryFlatulenceAirSmoke Inhalation InjuryLiver Function TestsAirway ObstructionPulmonary Diffusing CapacityTinidazoleBenzeneRespiratory MusclesVital CapacityDiaphragmAtmosphere Exposure ChambersOxygenPulmonary AlveoliFecesPartial PressureRespiration DisordersMouthIntestine, SmallLung ComplianceSpectrophotometry, InfraredMass SpectrometryCross-Over StudiesPositive-Pressure Respiration