title: Diagnosis of variant forms of hyperphenylalaninemia using filter paper spots of urine.
mesh_terms: D000328:Adult; D000429:Alcohol Oxidoreductases / Q000172:deficiency; D002851:Chromatography, High Pressure Liquid; D003937:Diagnosis, Differential; D005374:Filtration / Q000295:instrumentation; D006801:Humans; D007231:Infant, Newborn; D010649:Phenylalanine / Q000097:blood*; D010661:Phenylketonurias / Q000652:urine*
chemical_list: D010649:Phenylalanine; C020037:7,8-dihydrobiopterin synthetase; D000429:Alcohol Oxidoreductases