Lactose IntoleranceLactose Tolerance TestLactaseMalabsorption SyndromesLactoseHydrogenMilkBreath TestsLactase-Phlorizin HydrolaseFood Service, HospitalYogurtDisaccharidasesIndependent State of SamoaDieteticsEndoscopes, Gastrointestinalbeta-GalactosidaseIntestinal AbsorptionManuals as TopicSucraseDairy ProductsDiet TherapyJejunumSprue, TropicalCalcium, DietarySchilling TestIntrinsic FactorCeliac DiseaseFinlandBlood GlucoseLactose SynthaseGenotypeXylosePolymorphism, Single NucleotideVitamin B 12Proton-Coupled Folate TransporterFructose IntoleranceLactuloseIntestine, SmallCobalt IsotopesExocrine Pancreatic InsufficiencyPolymerase Chain ReactionLactose Factors