Fructose IntoleranceFructoseFructose-Bisphosphate AldolaseCarbohydrate Metabolism, Inborn ErrorsFructose Metabolism, Inborn ErrorsRenal AminoaciduriasFructosediphosphatesHexosediphosphatesFructosephosphatesFructose-BisphosphataseDNA Mutational AnalysisGlucose Transporter Type 5Phosphofructokinase-1FructokinasesMutationGlucosePhosphofructokinase-2Sweetening AgentsDietary CarbohydratesSucrose