"DOID:0050798"^^ . . _:vb50937619 . "disease_ontology"^^ . . "An amino acid metabolic disorder that is characterized by mental retardation, severe speech delay, behavioral abnormalities and seizures, has_material_basis_in mutation in the creatine transporter gene on chromosome Xq28."^^ . "2013-11-21T12:10:58Z"^^ . _:vb50937619 . _:vb50937619 . . "lschriml"^^ . _:vb50937619 . _:vb50937619 . "cerebral creatine deficiency syndrome"^^ .