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Phenylketonuria ( PKU ) is an autosomal recessive human genetic disorder caused by a deficiency of hepatic phenylalanine hydroxylase ( PAH , phenylalanine 4 - monooxygenase , EC 1 . 14 . 16 . 1 ) .
 Phenylketonuria, PKU, autosomal recessive human genetic disorder, deficiency of hepatic phenylalanine hydroxylase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Phenylketonuria, PKU, autosomal recessive human genetic disorder, deficiency of hepatic phenylalanine hydroxylase