title: Letter: Frequency of some metabolic disorders in Poland.
mesh_terms: D001681:Biological Assay; D005693:Galactosemias / Q000097:blood / Q000453:epidemiology*; D006639:Histidine / Q000097:blood; D006801:Humans; D007231:Infant, Newborn; D008403:Mass Screening; D010649:Phenylalanine / Q000097:blood; D010661:Phenylketonurias / Q000097:blood / Q000453:epidemiology*; D011044:Poland; D014443:Tyrosine / Q000097:blood
chemical_list: D014443:Tyrosine; D010649:Phenylalanine; D006639:Histidine