title: Phenylketonuria: implications of initial serum phenylalanine levels on cognitive development.
authors.forename: A
authors.initials: A
authors.lastname: Barclay
authors.forename: O
authors.initials: O
authors.lastname: Walton
mesh_terms: D002657:Child Development; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000097:blood*; D007361:Intelligence Tests; D010649:Phenylalanine / Q000097:blood*; D010661:Phenylketonurias / Q000097:blood*
chemical_list: D010649:Phenylalanine