Intellectual performance of 36 phenylketonuria patients and their nonaffected siblings.


Thirty-six patients with a confirmed diagnosis of phenylketonuria (PKU) were identified and placed on dietary therapy before reaching 121 days of age. These children are currently between 4 and 6 years old, and have been given the Stanford-Binet Intelligence Scale. Subsequently, their normal siblings of closet age were selected as matched-pair controls and… (More)


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