Metabolism, Inborn ErrorsAmino Acid Metabolism, Inborn ErrorsLipid Metabolism, Inborn ErrorsNeonatal ScreeningPurine-Pyrimidine Metabolism, Inborn ErrorsSteroid Metabolism, Inborn ErrorsCarbohydrate Metabolism, Inborn ErrorsUrea Cycle Disorders, InbornBrain Diseases, Metabolic, InbornArgininosuccinic AciduriaHyperammonemiaPhenylketonuriasSmith-Lemli-Opitz SyndromeRefractive ErrorsHomogentisate 1,2-DioxygenaseInfant, NewbornCandidiasis, Chronic MucocutaneousPyruvate Metabolism, Inborn Errorsalpha-GalactosidaseHomocystinuriaFabry DiseaseAustralian Capital TerritoryOrnithine Carbamoyltransferase Deficiency DiseaseArgininosuccinic AcidIsovaleryl-CoA DehydrogenaseHypophosphatasiaDiagnostic ErrorsHydroxocobalaminMethylmalonic AcidMethylmalonyl-CoA MutasePentanoic AcidsBrain Diseases, MetabolicOxidoreductases Acting on CH-CH Group DonorsFructose Metabolism, Inborn ErrorsMaple Syrup Urine DiseasePorphyria, ErythropoieticGlutaratesMutationCarnitineGlutaryl-CoA DehydrogenaseAmidinotransferasesFailure to ThriveMetal Metabolism, Inborn ErrorsHyperargininemiaLong-Chain-3-Hydroxyacyl-CoA DehydrogenaseAlkaptonuriaRare DiseasesCitrullinemiaMultiple Acyl Coenzyme A Dehydrogenase DeficiencyMucopolysaccharidosesMetabolic DiseasesIron Metabolism DisordersPyruvate Dehydrogenase Complex Deficiency DiseaseAdenylosuccinate LyaseLysosomal Storage DiseasesNeuroaxonal DystrophiesOrnithine-Oxo-Acid TransaminaseHyperoxaluria, PrimaryAcyl-CoA DehydrogenaseGenetic Diseases, InbornRenal Tubular Transport, Inborn ErrorsPedigreeUroporphyrinogen III SynthetaseArgininosuccinate LyaseHomozygoteCritical PathwaysPhlebotomyBlood Specimen CollectionConsanguinityPhenylalanine HydroxylaseDiet, Protein-RestrictedMolecular Sequence DataTechnology Assessment, BiomedicalOrnithineFibroblastsAcyl-CoA DehydrogenasesReproducibility of ResultsIntellectual DisabilityPhenotypeMutation, MissenseTandem Mass SpectrometryBase SequenceNervous System DiseasesImmunologic Deficiency SyndromesReference ValuesDNA Mutational AnalysisAlgorithmsAmino AcidsOxidoreductasesLiver DiseasesVitamin B 12Mass SpectrometryUreaLiverMagnetic Resonance SpectroscopyHeterozygoteGas Chromatography-Mass Spectrometry