3415
PKU is a common inborn error of amino - acid metabolism in caucasian populations and approximately 1 in 50 individuals are carriers of a PKU allele .
 PKU, inborn error of amino - acid metabolism, PKU
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 PKU, inborn error of amino - acid metabolism, PKU