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Classical phenylketonuria is an autosomal recessive disease caused by a deficiency of hepatic phenylalanine hydroxylase ( PAH ) .
 Classical phenylketonuria, autosomal recessive disease, 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:
 Classical phenylketonuria, autosomal recessive disease, deficiency of hepatic phenylalanine hydroxylase