Fructose IntoleranceFructoseFructose-Bisphosphate AldolaseCarbohydrate Metabolism, Inborn ErrorsFructose Metabolism, Inborn ErrorsRenal AminoaciduriasGlucoseFructosediphosphatesHexosediphosphatesDNA Mutational AnalysisFructosephosphatesBlood GlucoseMutationFructose-BisphosphataseGlucose Transporter Type 5Phosphofructokinase-1FructokinasesGlucose Tolerance TestDietary Carbohydrates