title: Experience with a screening service, using the Guthrie test, in the north-west and north-east metropolitan regions.
mesh_terms: D000592:Amino Acid Metabolism, Inborn Errors / Q000453:epidemiology; D001681:Biological Assay; D006712:Homocystinuria / Q000453:epidemiology; D006801:Humans; D007223:Infant; D008403:Mass Screening; D008715:Methionine / Q000097:blood; D010649:Phenylalanine / Q000097:blood; D010661:Phenylketonurias / Q000453:epidemiology*; D014443:Tyrosine / Q000097:blood
chemical_list: D014443:Tyrosine; D010649:Phenylalanine; D008715:Methionine