title: The sex ratio in phenylketonuria.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007360:Intelligence; D008297:Male; D009031:Moscow; D010661:Phenylketonurias / Q000175:diagnosis / Q000453:epidemiology*; D012744:Sex Ratio