20550
Androgen receptor ( AR ) action is critical for prostate cancer ( CaP ) progression , but is not inhibited fully by available androgen deprivation therapy ( ADT ) .
 Androgen, androgen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Androgen, androgen