Diagnosis of phenylketonuria by gas chromatography.
D002849:Chromatography, Gas; D006801:Humans; D007231:Infant, Newborn; D008722:Methods; D010649:Phenylalanine / Q000097:blood / Q000378:metabolism / Q000652:urine; D010661:Phenylketonurias / Q000175:diagnosis*
D010649:Phenylalanine