SEARCH Articles Figures Tables Diagnosis of Metabolic Disorders Disorders of Branched-Chain Amino Acid Metabolism Disorders of Copper, Zinc and Iron Metabolism Disorders of Histidine Metabolism Disorders of L-Lysine Metabolism Disorders of L-leucine metabolism Disorders of Phenylalanine and Tetrahydrobiopterin Metabolism Disorders of Propionate and Methylmalonate Metabolism Disorders of energy metabolism Disorders of lipoprotein metabolism Disorders of organic acid metabolism Genetic Disorders of Steroid Metabolism Diagnosed by Mass Spectrometry Metabolic disorder Metabolism disorders Other Causes of Disordered Folate Metabolism