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An accurate stable isotope dilution gas chromatographic–mass spectrometric approach to the diagnosis of guanidinoacetate methyltransferase deficiency

Guanidinoacetate Methyltransferase DeficiencyBiochemistryGas ChromatographyGeneticsBioanalysisMass SpectrometryIsotope GeochemistryAnalytical ChemistryStable Isotope ProbingMetabolismMedicineChromatography